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  • Adding an ASP website in IIS7.5 on Windows 7

    - by birdus
    enter preformatted text hereI'm trying to add an ASP website under IIS 7.5 on Windows 7 and am having no luck so far. This site is just for me to hit locally. I need to make some changes to some of the HTML in some of the ASP files and I just need to be able to test my changes as I make them. I installed IIS and checked the box for ASP. Next, I added an Application Pool which I called ASP and which has "No Managed Code" and "ASP" set. Next, I added the website by right-clicking "Sites" then clicking "Add Web Site...". I gave it a name, set it to use the ASP app pool, pointed it to the path where the ASP code is (I left it at pass-through authentication), and typed in 5555 as the port, so as to not interfere with the default website. The code is sitting on my server and the path simply uses the mapped drive that I always use to access files on that drive array. When I type in http://mysite:5555, I get "could not find mysite:5555". I don't really know if all these settings are correct or what else I should try. What am I missing? Thanks, Jay

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  • Grub install fails while installing Ubuntu on RAID

    - by Warren Pena
    I'm trying to install Ubuntu 9.10 using the alternate install CD, but I keep getting stuck. I get through the first few steps of the install process easily enough (telling it what partition to install to, what user ID and password to create, time zone, etc.), but then it suddenly pops up a menu asking me what the next step in the install process is. It has "Install the GRUB boot loader on a hard disk" selected by default. When I select it, it goes to another screen with a progress bar and a label "Installing the 'grub2' package." The progress bar gets to 16%, and then I get returned to the same menu. No matter how many times I try to install grub, the exact same thing happens. I'm trying to install Ubuntu on a two disk RAID-1 array. This is the RAID card I'm using: http://www.siig.com/ViewProduct.aspx?pn=SC-SAER12-S2. Any ideas what may be causing this to happen and how I can fix it? Thanks!

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  • ZFS SAS/SATA controller recommendations

    - by ewwhite
    I've been working with OpenSolaris and ZFS for 6 months, primarily on a Sun Fire x4540 and standard Dell and HP hardware. One downside to standard Perc and HP Smart Array controllers is that they do not have a true "passthrough" JBOD mode to present individual disks to ZFS. One can configure multiple RAID 0 arrays and get them working in ZFS, but it impacts hotswap capabilities (thus requiring a reboot upon disk failure/replacement). I'm curious as to what SAS/SATA controllers are recommended for home-brewed ZFS storage solutions. In addition, what effect does battery-backed write cache (BBWC) have in ZFS storage?

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  • How can I get the palette of an 8-bit surface in SDL.NET/Tao.SDL?

    - by lolmaster
    I'm looking to get the palette of an 8-bit surface in SDL.NET if possible, or (more than likely) using Tao.SDL. This is because I want to do palette swapping with the palette directly, instead of blitting surfaces together to replace colours like how you would do it with a 32-bit surface. I've gotten the SDL_Surface and the SDL_PixelFormat, however when I go to get the palette in the same way, I get a System.ExecutionEngineException: private Tao.Sdl.Sdl.SDL_Palette GetPalette(Surface surf) { // Get surface. Tao.Sdl.Sdl.SDL_Surface sdlSurface = (Tao.Sdl.Sdl.SDL_Surface)System.Runtime.InteropServices.Marshal.PtrToStructure(surf.Handle, typeof(Tao.Sdl.Sdl.SDL_Surface)); // Get pixel format. Tao.Sdl.Sdl.SDL_PixelFormat pixelFormat = (Tao.Sdl.Sdl.SDL_PixelFormat)System.Runtime.InteropServices.Marshal.PtrToStructure(sdlSurface.format, typeof(Tao.Sdl.Sdl.SDL_PixelFormat)); // Execution exception here. Tao.Sdl.Sdl.SDL_Palette palette = (Tao.Sdl.Sdl.SDL_Palette)System.Runtime.InteropServices.Marshal.PtrToStructure(pixelFormat.palette, typeof(Tao.Sdl.Sdl.SDL_Palette)); return palette; } When I used unsafe code to get the palette, I got a compile time error: "Cannot take the address of, get the size of, or declare a pointer to a managed type ('Tao.Sdl.Sdl.SDL_Palette')". My unsafe code to get the palette was this: unsafe { Tao.Sdl.Sdl.SDL_Palette* pal = (Tao.Sdl.Sdl.SDL_Palette*)pixelFormat.palette; } From what I've read, a managed type in this case is when a structure has some sort of reference inside it as a field. The SDL_Palette structure happens to have an array of SDL_Color's, so I'm assuming that's the reference type that is causing issues. However I'm still not sure how to work around that to get the underlying palette. So if anyone knows how to get the palette from an 8-bit surface, whether it's through safe or unsafe code, the help would be greatly appreciated.

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  • PostgreSQL server: 10k RPM SAS or Intel 520 Series SSD drives?

    - by Vlad
    We will be expanding the storage for a PostgreSQL server and one of the things we are considering is using SSDs (Intel 520 Series) instead of rotating discs (10k RPM). Price per GB is comparable and we expect improved performance, however we are concerned about longevity since our database usage pattern is quite write-heavy. We are also concerned about data corruption in case of power failure (due to SSDs write cache not flushing properly). We currently use RAID10 with 4 active HDDs (10k 146GB) and 1 spare configured in the controller. It's a HP DL380 G6 server with P410 Smart Array Controller and BBWC. What makes more sense: upgrading the drives to 300GB 10k RPM or using Intel 520 Series SSDs (240GB)?

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  • Compiling Gnucash 2.6.3 in Ubuntu 14.04

    - by wolveryn
    Downloaded the debian file from source forge and followed instructions, where these errors appear, I re-downloaded the file several times with same error. I want to install the latest Gnucash not the one available on software center. Thank you for your support. /qof/gnc-date/qof print date dmy buff: There are some differences between distros in the way they namelocales, and this can cause trouble with the locale-basedformatting. If you get the assert in this function, run locale -aand make sure that en_US, en_GB, and fr_FR are installed and thatif a suffix is needed it's in the suffixes array.** ERROR:test-gnc-date.c:465:test_gnc_setlocale: code should not be reached FAIL GTester: last random seed: R02Sd8d3d0e67be954baa8ec75d81a14c0e3 /bin/bash: line 1: 18889 Terminated MALLOC_CHECK_=2 MALLOC_PERTURB_=$((${RANDOM:-256} % 256)) gtester --verbose test-qof make[5]: *** [test-nonrecursive] Error 143 make[5]: Leaving directory `/home/ahmed/gnucash/gnucash-2.6.3/src/libqof/qof/test' make[4]: *** [check-am] Error 2 make[4]: Leaving directory `/home/ahmed/gnucash/gnucash-2.6.3/src/libqof/qof/test' make[3]: *** [check-recursive] Error 1 make[3]: Leaving directory `/home/ahmed/gnucash/gnucash-2.6.3/src/libqof/qof' make[2]: *** [check-recursive] Error 1 make[2]: Leaving directory `/home/ahmed/gnucash/gnucash-2.6.3/src/libqof' make[1]: *** [check-recursive] Error 1 make[1]: Leaving directory `/home/ahmed/gnucash/gnucash-2.6.3/src' make: *** [check-recursive] Error 1

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  • C#/.NET &ndash; Finding an Item&rsquo;s Index in IEnumerable&lt;T&gt;

    - by James Michael Hare
    Sorry for the long blogging hiatus.  First it was, of course, the holidays hustle and bustle, then my brother and his wife gave birth to their son, so I’ve been away from my blogging for two weeks. Background: Finding an item’s index in List<T> is easy… Many times in our day to day programming activities, we want to find the index of an item in a collection.  Now, if we have a List<T> and we’re looking for the item itself this is trivial: 1: // assume have a list of ints: 2: var list = new List<int> { 1, 13, 42, 64, 121, 77, 5, 99, 132 }; 3:  4: // can find the exact item using IndexOf() 5: var pos = list.IndexOf(64); This will return the position of the item if it’s found, or –1 if not.  It’s easy to see how this works for primitive types where equality is well defined.  For complex types, however, it will attempt to compare them using EqualityComparer<T>.Default which, in a nutshell, relies on the object’s Equals() method. So what if we want to search for a condition instead of equality?  That’s also easy in a List<T> with the FindIndex() method: 1: // assume have a list of ints: 2: var list = new List<int> { 1, 13, 42, 64, 121, 77, 5, 99, 132 }; 3:  4: // finds index of first even number or -1 if not found. 5: var pos = list.FindIndex(i => i % 2 == 0);   Problem: Finding an item’s index in IEnumerable<T> is not so easy... This is all well and good for lists, but what if we want to do the same thing for IEnumerable<T>?  A collection of IEnumerable<T> has no indexing, so there’s no direct method to find an item’s index.  LINQ, as powerful as it is, gives us many tools to get us this information, but not in one step.  As with almost any problem involving collections, there are several ways to accomplish the same goal.  And once again as with almost any problem involving collections, the choice of the solution somewhat depends on the situation. So let’s look at a few possible alternatives.  I’m going to express each of these as extension methods for simplicity and consistency. Solution: The TakeWhile() and Count() combo One of the things you can do is to perform a TakeWhile() on the list as long as your find condition is not true, and then do a Count() of the items it took.  The only downside to this method is that if the item is not in the list, the index will be the full Count() of items, and not –1.  So if you don’t know the size of the list beforehand, this can be confusing. 1: // a collection of extra extension methods off IEnumerable<T> 2: public static class EnumerableExtensions 3: { 4: // Finds an item in the collection, similar to List<T>.FindIndex() 5: public static int FindIndex<T>(this IEnumerable<T> list, Predicate<T> finder) 6: { 7: // note if item not found, result is length and not -1! 8: return list.TakeWhile(i => !finder(i)).Count(); 9: } 10: } Personally, I don’t like switching the paradigm of not found away from –1, so this is one of my least favorites.  Solution: Select with index Many people don’t realize that there is an alternative form of the LINQ Select() method that will provide you an index of the item being selected: 1: list.Select( (item,index) => do something here with the item and/or index... ) This can come in handy, but must be treated with care.  This is because the index provided is only as pertains to the result of previous operations (if any).  For example: 1: // assume have a list of ints: 2: var list = new List<int> { 1, 13, 42, 64, 121, 77, 5, 99, 132 }; 3:  4: // you'd hope this would give you the indexes of the even numbers 5: // which would be 2, 3, 8, but in reality it gives you 0, 1, 2 6: list.Where(item => item % 2 == 0).Select((item,index) => index); The reason the example gives you the collection { 0, 1, 2 } is because the where clause passes over any items that are odd, and therefore only the even items are given to the select and only they are given indexes. Conversely, we can’t select the index and then test the item in a Where() clause, because then the Where() clause would be operating on the index and not the item! So, what we have to do is to select the item and index and put them together in an anonymous type.  It looks ugly, but it works: 1: // extensions defined on IEnumerable<T> 2: public static class EnumerableExtensions 3: { 4: // finds an item in a collection, similar to List<T>.FindIndex() 5: public static int FindIndex<T>(this IEnumerable<T> list, Predicate<T> finder) 6: { 7: // if you don't name the anonymous properties they are the variable names 8: return list.Select((item, index) => new { item, index }) 9: .Where(p => finder(p.item)) 10: .Select(p => p.index + 1) 11: .FirstOrDefault() - 1; 12: } 13: }     So let’s look at this, because i know it’s convoluted: First Select() joins the items and their indexes into an anonymous type. Where() filters that list to only the ones matching the predicate. Second Select() picks the index of the matches and adds 1 – this is to distinguish between not found and first item. FirstOrDefault() returns the first item found from the previous clauses or default (zero) if not found. Subtract one so that not found (zero) will be –1, and first item (one) will be zero. The bad thing is, this is ugly as hell and creates anonymous objects for each item tested until it finds the match.  This concerns me a bit but we’ll defer judgment until compare the relative performances below. Solution: Convert ToList() and use FindIndex() This solution is easy enough.  We know any IEnumerable<T> can be converted to List<T> using the LINQ extension method ToList(), so we can easily convert the collection to a list and then just use the FindIndex() method baked into List<T>. 1: // a collection of extension methods for IEnumerable<T> 2: public static class EnumerableExtensions 3: { 4: // find the index of an item in the collection similar to List<T>.FindIndex() 5: public static int FindIndex<T>(this IEnumerable<T> list, Predicate<T> finder) 6: { 7: return list.ToList().FindIndex(finder); 8: } 9: } This solution is simplicity itself!  It is very concise and elegant and you need not worry about anyone misinterpreting what it’s trying to do (as opposed to the more convoluted LINQ methods above). But the main thing I’m concerned about here is the performance hit to allocate the List<T> in the ToList() call, but once again we’ll explore that in a second. Solution: Roll your own FindIndex() for IEnumerable<T> Of course, you can always roll your own FindIndex() method for IEnumerable<T>.  It would be a very simple for loop which scans for the item and counts as it goes.  There’s many ways to do this, but one such way might look like: 1: // extension methods for IEnumerable<T> 2: public static class EnumerableExtensions 3: { 4: // Finds an item matching a predicate in the enumeration, much like List<T>.FindIndex() 5: public static int FindIndex<T>(this IEnumerable<T> list, Predicate<T> finder) 6: { 7: int index = 0; 8: foreach (var item in list) 9: { 10: if (finder(item)) 11: { 12: return index; 13: } 14:  15: index++; 16: } 17:  18: return -1; 19: } 20: } Well, it’s not quite simplicity, and those less familiar with LINQ may prefer it since it doesn’t include all of the lambdas and behind the scenes iterators that come with deferred execution.  But does having this long, blown out method really gain us much in performance? Comparison of Proposed Solutions So we’ve now seen four solutions, let’s analyze their collective performance.  I took each of the four methods described above and run them over 100,000 iterations of lists of size 10, 100, 1000, and 10000 and here’s the performance results.  Then I looked for targets at the begining of the list (best case), middle of the list (the average case) and not in the list (worst case as must scan all of the list). Each of the times below is the average time in milliseconds for one execution as computer over the 100,000 iterations: Searches Matching First Item (Best Case)   10 100 1000 10000 TakeWhile 0.0003 0.0003 0.0003 0.0003 Select 0.0005 0.0005 0.0005 0.0005 ToList 0.0002 0.0003 0.0013 0.0121 Manual 0.0001 0.0001 0.0001 0.0001   Searches Matching Middle Item (Average Case)   10 100 1000 10000 TakeWhile 0.0004 0.0020 0.0191 0.1889 Select 0.0008 0.0042 0.0387 0.3802 ToList 0.0002 0.0007 0.0057 0.0562 Manual 0.0002 0.0013 0.0129 0.1255   Searches Where Not Found (Worst Case)   10 100 1000 10000 TakeWhile 0.0006 0.0039 0.0381 0.3770 Select 0.0012 0.0081 0.0758 0.7583 ToList 0.0002 0.0012 0.0100 0.0996 Manual 0.0003 0.0026 0.0253 0.2514   Notice something interesting here, you’d think the “roll your own” loop would be the most efficient, but it only wins when the item is first (or very close to it) regardless of list size.  In almost all other cases though and in particular the average case and worst case, the ToList()/FindIndex() combo wins for performance, even though it is creating some temporary memory to hold the List<T>.  If you examine the algorithm, the reason why is most likely because once it’s in a ToList() form, internally FindIndex() scans the internal array which is much more efficient to iterate over.  Thus, it takes a one time performance hit (not including any GC impact) to create the List<T> but after that the performance is much better. Summary If you’re concerned about too many throw-away objects, you can always roll your own FindIndex() method, but for sheer simplicity and overall performance, using the ToList()/FindIndex() combo performs best on nearly all list sizes in the average and worst cases.    Technorati Tags: C#,.NET,Litte Wonders,BlackRabbitCoder,Software,LINQ,List

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  • Making a Case For The Command Line

    - by Jesse Taber
    Originally posted on: http://geekswithblogs.net/GruffCode/archive/2013/06/30/making-a-case-for-the-command-line.aspxI have had an idea percolating in the back of my mind for over a year now that I’ve just recently started to implement. This idea relates to building out “internal tools” to ease the maintenance and on-going support of a software system. The system that I currently work on is (mostly) web-based, so we traditionally we have built these internal tools in the form of pages within the app that are only accessible by our developers and support personnel. These pages allow us to perform tasks within the system that, for one reason or another, we don’t want to let our end users perform (e.g. mass create/update/delete operations on data, flipping switches that turn paid modules of the system on or off, etc). When we try to build new tools like this we often struggle with the level of effort required to build them. Effort Required Creating a whole new page in an existing web application can be a fairly large undertaking. You need to create the page and ensure it will have a layout that is consistent with the other pages in the app. You need to decide what types of input controls need to go onto the page. You need to ensure that everything uses the same style as the rest of the site. You need to figure out what the text on the page should say. Then, when you figure out that you forgot about an input that should really be present you might have to go back and re-work the entire thing. Oh, and in addition to all of that, you still have to, you know, write the code that actually performs the task. Everything other than the code that performs the task at hand is just overhead. We don’t need a fancy date picker control in a nicely styled page for the vast majority of our internal tools. We don’t even really need a page, for that matter. We just need a way to issue a command to the application and have it, in turn, execute the code that we’ve written to accomplish a given task. All we really need is a simple console application! Plumbing Problems A former co-worker of mine, John Sonmez, always advocated the Unix philosophy for building internal tools: start with something that runs at the command line, and then build a UI on top of that if you need to. John’s idea has a lot of merit, and we tried building out some internal tools as simple Console applications. Unfortunately, this was often easier said that done. Doing a “File –> New Project” to build out a tool for a mature system can be pretty daunting because that new project is totally empty.  In our case, the web application code had a lot of of “plumbing” built in: it managed authentication and authorization, it handled database connection management for our multi-tenanted architecture, it managed all of the context that needs to follow a user around the application such as their timezone and regional/language settings. In addition, the configuration file for the web application  (a web.config in our case because this is an ASP .NET application) is large and would need to be reproduced into a similar configuration file for a Console application. While most of these problems are could be solved pretty easily with some refactoring of the codebase, building Console applications for internal tools still potentially suffers from one pretty big drawback: you’d have to execute them on a machine with network access to all of the needed resources. Obviously, our web servers can easily communicate the the database servers and can publish messages to our service bus, but the same is not true for all of our developer and support personnel workstations. We could have everyone run these tools remotely via RDP or SSH, but that’s a bit cumbersome and certainly a lot less convenient than having the tools built into the web application that is so easily accessible. Mix and Match So we need a way to build tools that are easily accessible via the web application but also don’t require the overhead of creating a user interface. This is where my idea comes into play: why not just build a command line interface into the web application? If it’s part of the web application we get all of the plumbing that comes along with that code, and we’re executing everything on the web servers which means we’ll have access to any external resources that we might need. Rather than having to incur the overhead of creating a brand new page for each tool that we want to build, we can create one new page that simply accepts a command in text form and executes it as a request on the web server. In this way, we can focus on writing the code to accomplish the task. If the tool ends up being heavily used, then (and only then) should we consider spending the time to build a better user experience around it. To be clear, I’m not trying to downplay the importance of building great user experiences into your system; we should all strive to provide the best UX possible to our end users. I’m only advocating this sort of bare-bones interface for internal consumption by the technical staff that builds and supports the software. This command line interface should be the “back end” to a highly polished and eye-pleasing public face. Implementation As I mentioned at the beginning of this post, this is an idea that I’ve had for awhile but have only recently started building out. I’ve outlined some general guidelines and design goals for this effort as follows: Text in, text out: In the interest of keeping things as simple as possible, I want this interface to be purely text-based. Users will submit commands as plain text, and the application will provide responses in plain text. Obviously this text will be “wrapped” within the context of HTTP requests and responses, but I don’t want to have to think about HTML or CSS when taking input from the user or displaying responses back to the user. Task-oriented code only: After building the initial “harness” for this interface, the only code that should need to be written to create a new internal tool should be code that is expressly needed to accomplish the task that the tool is intended to support. If we want to encourage and enable ourselves to build good tooling, we need to lower the barriers to entry as much as possible. Built-in documentation: One of the great things about most command line utilities is the ‘help’ switch that provides usage guidelines and details about the arguments that the utility accepts. Our web-based command line utility should allow us to build the documentation for these tools directly into the code of the tools themselves. I finally started trying to implement this idea when I heard about a fantastic open-source library called CLAP (Command Line Auto Parser) that lets me meet the guidelines outlined above. CLAP lets you define classes with public methods that can be easily invoked from the command line. Here’s a quick example of the code that would be needed to create a new tool to do something within your system: 1: public class CustomerTools 2: { 3: [Verb] 4: public void UpdateName(int customerId, string firstName, string lastName) 5: { 6: //invoke internal services/domain objects/hwatever to perform update 7: } 8: } This is just a regular class with a single public method (though you could have as many methods as you want). The method is decorated with the ‘Verb’ attribute that tells the CLAP library that it is a method that can be invoked from the command line. Here is how you would invoke that code: Parser.Run(args, new CustomerTools()); Note that ‘args’ is just a string[] that would normally be passed passed in from the static Main method of a Console application. Also, CLAP allows you to pass in multiple classes that define [Verb] methods so you can opt to organize the code that CLAP will invoke in any way that you like. You can invoke this code from a command line application like this: SomeExe UpdateName -customerId:123 -firstName:Jesse -lastName:Taber ‘SomeExe’ in this example just represents the name of .exe that is would be created from our Console application. CLAP then interprets the arguments passed in order to find the method that should be invoked and automatically parses out the parameters that need to be passed in. After a quick spike, I’ve found that invoking the ‘Parser’ class can be done from within the context of a web application just as easily as it can from within the ‘Main’ method entry point of a Console application. There are, however, a few sticking points that I’m working around: Splitting arguments into the ‘args’ array like the command line: When you invoke a standard .NET console application you get the arguments that were passed in by the user split into a handy array (this is the ‘args’ parameter referenced above). Generally speaking they get split by whitespace, but it’s also clever enough to handle things like ignoring whitespace in a phrase that is surrounded by quotes. We’ll need to re-create this logic within our web application so that we can give the ‘args’ value to CLAP just like a console application would. Providing a response to the user: If you were writing a console application, you might just use Console.WriteLine to provide responses to the user as to the progress and eventual outcome of the command. We can’t use Console.WriteLine within a web application, so I’ll need to find another way to provide feedback to the user. Preferably this approach would allow me to use the same handler classes from both a Console application and a web application, so some kind of strategy pattern will likely emerge from this effort. Submitting files: Often an internal tool needs to support doing some kind of operation in bulk, and the easiest way to submit the data needed to support the bulk operation is in a file. Getting the file uploaded and available to the CLAP handler classes will take a little bit of effort. Mimicking the console experience: This isn’t really a requirement so much as a “nice to have”. To start out, the command-line interface in the web application will probably be a single ‘textarea’ control with a button to submit the contents to a handler that will pass it along to CLAP to be parsed and run. I think it would be interesting to use some javascript and CSS trickery to change that page into something with more of a “shell” interface look and feel. I’ll be blogging more about this effort in the future and will include some code snippets (or maybe even a full blown example app) as I progress. I also think that I’ll probably end up either submitting some pull requests to the CLAP project or possibly forking/wrapping it into a more web-friendly package and open sourcing that.

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  • Slow NFS transfer performance of small files

    - by Arie K
    I'm using Openfiler 2.3 on an HP ML370 G5, Smart Array P400, SAS disks combined using RAID 1+0. I set up an NFS share from ext3 partition using Openfiler's web based configuration, and I succeeded to mount the share from another host. Both host are connected using dedicated gigabit link. Simple benchmark using dd: $ dd if=/dev/zero of=outfile bs=1000 count=2000000 2000000+0 records in 2000000+0 records out 2000000000 bytes (2.0 GB) copied, 34.4737 s, 58.0 MB/s I see it can achieve moderate transfer speed (58.0 MB/s). But if I copy a directory containing many small files (.php and .jpg, around 1-4 kB per file) of total size ~300 MB, the cp process ends in about 10 minutes. Is NFS not suitable for small file transfer like above case? Or is there some parameters that must be adjusted?

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  • Code Trivia #4

    - by João Angelo
    Got the inspiration for this one in a recent stackoverflow question. What should the following code output and why? class Program { class Author { public string FirstName { get; set; } public string LastName { get; set; } public override string ToString() { return LastName + ", " + FirstName; } } static void Main() { Author[] authors = new[] { new Author { FirstName = "John", LastName = "Doe" }, new Author { FirstName = "Jane", LastName="Doe" } }; var line1 = String.Format("Authors: {0} and {1}", authors); Console.WriteLine(line1); string[] serial = new string[] { "AG27H", "6GHW9" }; var line2 = String.Format("Serial: {0}-{1}", serial); Console.WriteLine(line2); int[] version = new int[] { 1, 0 }; var line3 = String.Format("Version: {0}.{1}", version); Console.WriteLine(line3); } } Update: The code will print the first two lines // Authors: Doe, John and Doe, Jane // Serial: AG27H-6GHW9 and then throw an exception on the third call to String.Format because array covariance is not supported in value types. Given this the third call of String.Format will not resolve to String.Format(string, params object[]), like the previous two, but to String.Format(string, object) which fails to provide the second argument for the specified format and will then cause the exception.

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  • RAID1 Hard drives with Intel Controller

    - by Dave_H
    I have an older server with 2 35GB hard drives arranged as a RAID-1 drive. I have 3 open bays, I'd like to add 2 more hard drives to the open bays and have all 4 drives configured as a RAID-1 drive that Windows sees as 1 larger drive. Is this possible? If not, the new drives are 2x as big as the old drives, is it possible to replace 1 of the old drives and rebuild then replace the second drive and rebuild and somehow expand the array to use all of the available space? The server is using an Intel hardware raid controller, the software interface is Intel Storage Console v2.12.

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  • Switching BIOS SATA RAID/AHCI setting causes BSOD at Windows Start - Why?

    - by thephatp
    I just changed my disk setup from: 1 SATA HDD Primary OS Disk 2x SATA HDD Backup Disks in RAID 1 TO: 1 SATA SSD Primary OS Disk 1 SATA HDD Backup Disk [No RAID] Everything worked great, no problem. So, since I don't have a RAID array anymore, I decided that I could change my BIOS setting to AHCI instead of RAID. I have a Gigabyte GA-P35-DS3R v1.0 mobo. These are my steps: Settings Integrated Peripherals "SATA RAID/AHCI Mode" = RAID -- Changed this setting to AHCI Reboot Windows Start screen shows up, but as the color orbs are spinning into focus, BSOD and immediate restart Repeated reboot several times, same outcome Next Step: Launch BIOS settings Integrated Peripherals "Onboard SATA/IDE Ctrl Mode" = RAID -- Changed this setting to AHCI Reboot Windows Start screen shows up, but as the color orbs are spinning into focus, BSOD and immediate restart Repeated reboot several times, same outcome Switch both settings back to RAID, reboot, and Windows starts up just fine, no issues. What am I missing? Why can't I set it to AHCI mode without BSODs?

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  • Postfix/Procmail mailing list software

    - by Jason Antman
    I'm looking for suggestions on mailing list software to use on an existing server running Postfix/Procmail. Something relatively simple. requirements: 1 list, < 50 subscribers list members dumped in a certain file by a script (being pulled from LDAP or MySQL on another box) Handles MIME, images, etc. Moderation features No subscription/unsubscription - just goes by the file or database. Mailman is far too heavy-weight, and doesn't seem to play (easily) with Postfix/Procmail. I'm currently using a PHP script that just receives mail as a user, reads a list of members from a serialized array (file dumped on box via cron on the machine with the MySQL database containing members) and re-mails it to everyone. Unfortunately, we now need moderation capabilities, and I don't quite feel like adding that to the PHP script if there's already something out there that does it. Thanks for any tips. -Jason

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  • Gain Total Control of Systems running Oracle Linux

    - by Anand Akela
    Oracle Linux is the best Linux for enterprise computing needs and Oracle Enterprise Manager enables enterprises to gain total control over systems running Oracle Linux. Linux Management functionality is available as part of Oracle Enterprise Manager 12c and is available to Oracle Linux Basic and Premier Support customers at no cost. The solution provides an integrated and cost-effective solution for complete Linux systems lifecycle management and delivers comprehensive provisioning, patching, monitoring, and administration capabilities via a single, web-based user interface thus significantly reducing the complexity and cost associated with managing Linux operating system environments. Many enterprises are transforming their IT infrastructure from multiple independent datacenters to an Infrastructure-as-a-Service (IaaS) model, in which shared pools of compute and storage are made available to end-users on a self-service basis. While providing significant improvements when implemented properly, this strategy introduces change and complexity at a time when datacenters are already understaffed and overburdened. To aid in this transformation, IT managers need the proper tools to help them provide the array of IT capabilities required throughout the organization without stretching their staff and budget to the limit. Oracle Enterprise Manager 12c offers  the advanced capabilities to enable IT departments and end-users to take advantage of many benefits and cost savings of IaaS. Oracle Enterprise Manager Ops Center 12c addresses this challenge with a converged approach that integrates systems management across the infrastructure stack, helping organizations to streamline operations, increase productivity, and reduce system downtime.  You can see the Linux management functionality in action by watching the latest integrated Linux management demo . Stay Connected with Oracle Enterprise Manager: Twitter |  Face book |  You Tube |  Linked in |  Newsletter

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  • Uploading files to https mediawiki

    - by zac
    I am unable to upload files (images) to my mediawiki install. I think it may have something to do with it is being hosted as http secure(HTTPS). I followed carefully the instructions here. I updated write permissions to the /images/ dir drwxrwxrwx 2 apache apache 4096 Apr 13 19:04 images php.ini file_uploads = On In LocalSettings.php $wgEnableUploads = true; $wgFileExtensions = array('png','jpg','jpeg','gif'); When I try to upload it quickly refreshes the page without any errors or any indication anything went wrong, other than how fast it refreshed. When I navigate to the history of uploads it is empty. How can I troubleshoot this. Is it related to the secure http?

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  • Is a "failed" RAID 5 disk really no good?

    - by GregH
    This is my first venture in to setting up RAID on my home system. After installing 3 x 1TB drives in RAID 5, everything was running well for about 10 days. Then, the Intel Rapid Storage Technology software that monitors the disks and RAID on my system, told me that I had a failed drive. I marked the drive as good, and the array rebuilt. Then a day or so later I got a notification again, that the drive failed. I'm just wondering if this drive really is no good or if there is something I can do to get it working again? Or, do I just need to return it to the store where I bought it and get a replacement?

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  • Misunderstanding Scope in JavaScript?

    - by Jeff
    I've seen a few other developers talk about binding scope in JavaScript but it has always seemed to me like this is an inaccurate phrase. The Function.prototype.call and Function.prototype.apply don't pass scope around between two methods; they change the caller of the function - two very different things. For example: function outer() { var item = { foo: 'foo' }; var bar = 'bar'; inner.apply(item, null); } function inner() { console.log(this.foo); //foo console.log(bar); //ReferenceError: bar is not defined } If the scope of outer was really passed into inner, I would expect that inner would be able to access bar, but it can't. bar was in scope in outer and it is out of scope in inner. Hence, the scope wasn't passed. Even the Mozilla docs don't mention anything about passing scope: Calls a function with a given this value and arguments provided as an array. Am I misunderstanding scope or specifically scope as it applies to JavaScript? Or is it these other developers that are misunderstanding it?

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  • Design pattern for procedural terrain assets

    - by Alex
    I'm developing a procedural terrain class at the moment and am stuck on the correct design pattern. The terrain is 2D and is constructed from a series of (x,y) points. I currently have a method that just randomly adds points to an array of points to generate a random spread of points. However I need a more elaborate system for generating the terrain. The terrain will be built form a series of re-accuring terrain structures eg. a pit, jump, hill etc. Each structure will have some randomness assigned to it, each height of hill will be random, pit size will be random etc. Each terrain structure will have: A property detailing the number of points making up that structure A method for generating the points (not absolutely necessary) My current thinking is to have a class for each terrain structure, create a fixed amount of terrain elements ahead of the player, loop over these and add the corresponding points to the game. What is the best way to create these procedural terrain structures when they are ultimately just a set of functions for generating terrain elements? Is a class for each terrain element excessive? I'm developing the game for iphone so any objective-c related answers would be welcome.

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  • 3ware RAID in Windows 7

    - by scribbles
    Just moved a 3ware 9500S-8 raid card and a few drives from my linux box into my win7 box. Windows Updates picked up the 3ware driver and installed it. After a reboot I checked Disk Management and it shows the array as one solid drive with the correct size. The only issue is that its not assigned a drive letter and when I right click on it my only option is to Convert to Dynamic Disk... From what I've read this is not something I want to do. What are my options?

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  • How can a single script attached to multiple enemies provide separate behavior for each enemy?

    - by Syed
    I am making a TD game and now stucked at multiple enemies using same script. All is well with scripts attached with one enemy only. Problem is in running multiple enemies. Here is the overview. I have a Enemy object with which I have attached a 'RunEnemy' script. Flow of this script is: RunEnemy.cs: PathF p; p = gameObject.GetComponent<PathF>(); //PathF is a pathfinding algo which has 'search; function which returns a array of path from starting position PathList = p.search(starting position); //------------------------------- if(PathList != null) { //if a way found! if(moving forward) transform.Translate(someXvalue,0,0); //translates on every frame until next grid point else if(moving back) transform.Translate(0,someXvalue,0); ...and so on.. if(reached on next point) PathList = p.search(from this point) //call again from next grid point so that if user placed a tower enemy will run again on the returned path } Now I have attached this script and "PathF.cs" to a single enemy which works perfect. I have then made one more enemy object and attached both of these script to it as well, which is not working they both are overlapping movements. I can't understand why, I have attached these scripts on two different gameobjects but still their values change when either enemy changes its value. I don't want to go with a separate script for each enemy because there would be 30 enemies in a scene. How can I fix this problem?

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  • Keyboard input system handling

    - by The Communist Duck
    Note: I have to poll, rather than do callbacks because of API limitations (SFML). I also apologize for the lack of a 'decent' title. I think I have two questions here; how to register the input I'm receiving, and what to do with it. Handling Input I'm talking about after the fact you've registered that the 'A' key has been pressed, for example, and how to do it from there. I've seen an array of the whole keyboard, something like: bool keyboard[256]; //And each input loop check the state of every key on the keyboard But this seems inefficient. Not only are you coupling the key 'A' to 'player moving left', for example, but it checks every key, 30-60 times a second. I then tried another system which just looked for keys it wanted. std::map< unsigned char, Key keyMap; //Key stores the keycode, and whether it's been pressed. Then, I declare a load of const unsigned char called 'Quit' or 'PlayerLeft'. input-BindKey(Keys::PlayerLeft, KeyCode::A); //so now you can check if PlayerLeft, rather than if A. However, the problem with this is I cannot now type a name, for example, without having to bind every single key. Then, I have the second problem, which I cannot really think of a good solution for: Sending Input I now know that the A key has been pressed or that playerLeft is true. But how do I go from here? I thought about just checking if(input-IsKeyDown(Key::PlayerLeft) { player.MoveLeft(); } This couples the input greatly to the entities, and I find it rather messy. I'd prefer the player to handle its own movement when it gets updated. I thought some kind of event system could work, but I do not know how to go with it. (I heard signals and slots was good for this kind of work, but it's apparently very slow and I cannot see how it'd fit). Thanks.

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  • CodePlex Daily Summary for Tuesday, May 29, 2012

    CodePlex Daily Summary for Tuesday, May 29, 2012Popular ReleasesDotNetNuke Azure Accelerator: DotNetNuke Azure Accelerator 6.2: Windows Azure deployments of DotNetNuke Community using virtual hard drive (cloud-drive) image that is created dynamically on the cloud. Enables the creation of new DotNetNuke host instances from on-premise to the cloud using a wizard that guides you on this process, creating the SQL Azure database, uploading the solution engine and associated service configurations. New features in this releaseModified the web roles endpoints to allow traffic on port 443 Changed the package unzip operati...Thales Simulator Library: Version 0.9.6: The Thales Simulator Library is an implementation of a software emulation of the Thales (formerly Zaxus & Racal) Hardware Security Module cryptographic device. This release fixes a problem with the FK command and a bug in the implementation of PIN block 05 format deconstruction. A new 0.9.6.Binaries file has been posted. This includes executable programs without an installer, including the GUI and console simulators, the key manager and the PVV clashing demo. Please note that you will need ...myManga: myManga v1.0.0.2: Fixed the 'Lost+Brain' error on MangaReader. The main download has this update. The second download is for those who have already downloaded the old v1.0.0.2. DELETE OLD EXE and DLLs before you copy the new files over.To update from v1.0.0.1:Extract new myManga EXE and DLLs from Zip to folder of choosing. Copy MangaInfo and MangaArchives folder from old myManga folder to new folder from step 1. ORDelete: The new myManga.exe contains the CoreMangaClasses.dll and Manga.dll internally. Delet...????: ????2.0.1: 1、?????。WiX Toolset: WiX v3.6 RC: WiX v3.6 RC (3.6.2928.0) provides feature complete Burn with VS11 support. For more information see Rob's blog post about the release: http://robmensching.com/blog/posts/2012/5/28/WiX-v3.6-Release-Candidate-availableJavascript .NET: Javascript .NET v0.7: SetParameter() reverts to its old behaviour of allowing JavaScript code to add new properties to wrapped C# objects. The behavior added briefly in 0.6 (throws an exception) can be had via the new SetParameterOptions.RejectUnknownProperties. TerminateExecution now uses its isolate to terminate the correct context automatically. Added support for converting all C# integral types, decimal and enums to JavaScript numbers. (Previously only the common types were handled properly.) Bug fixe...Indent Guides for Visual Studio: Indent Guides v12: Version History Changed in v12: background document analysis new options dialog with Quick Set selections for behavior new "glow" style for guides new menu icon in VS 11 preview control now uses editor theming highlighting can be customised on each line fixed issues with collapsed code blocks improved behaviour around left-aligned pragma/preprocessor commands (C#/C++) new settings for controlling guides in empty lines restructured settings storage (should be more reliable) ...callisto: callisto 2.0.29: Added DNS functionality to scripting. See documentation section for details of how to incorporate this into your scripts.ZXMAK2: Version 2.6.2.2: - implemented read port #7FFD glitch for ULA128 (fusetest) - fix unhandled exception inside open dialog - fix Z80 format serializer (support 55 bytes header & non compressed 128 blocks - thanks to Ralf) This release include SPRINTER emulation, but boot system disk image was removed.Phalanger - The PHP Language Compiler for the .NET Framework: 3.0 (May 2012): Fixes: unserialize() of negative float numbers fix pcre possesive quantifiers and character class containing ()[] array deserilization when the array contains a reference to ISerializable parsing lambda function fix round() reimplemented as it is in PHP to avoid .NET rounding errors filesize bypass for FileInfo.Length bug in Mono New features: Time zones reimplemented, uses Windows/Linux databaseSharePoint Euro 2012 - UEFA European Football Predictor: havivi.euro2012.wsp (1.1): New fetures:Admin enable / disable match Hide/Show Euro 2012 SharePoint lists (3 lists) Installing SharePoint Euro 2012 PredictorSharePoint Euro 2012 Predictor has been developed as a SharePoint Sandbox solution to support SharePoint Online (Office 365) Download the solution havivi.euro2012.wsp from the download page: Downloads Upload this solution to your Site Collection via the solutions area. Click on Activate to make the web parts in the solution available for use in the Site C...ScreenShot: InstallScreenShot: This is the current stable release.????SDK for .Net 4.0+(OAuth2.0+??V2?API): ??V2?SDK???: ????SDK for .Net 4.X???????PHP?SDK???OAuth??API???Client???。 ??????API?? ???????OAuth2.0???? ???:????????,DEMO??AppKey????????????????,?????AppKey,????AppKey???????????,?????“????>????>????>??????”.Net Code Samples: Code Samples: Code samples (SLNs).LINQ_Koans: LinqKoans v.02: Cleaned up a bitExpression Tree Visualizer for VS 2010: Expression Tree Visualizer Beta: This is a beta release, in this release some expression types are not handled and use a default visualization behavior. The first release will be published soon. Wait for it...Ulfi: Ulfi source: Build with Visual Studio 2010 Express C# or betterJayData - The cross-platform HTML5 data-management library for JavaScript: JayData 1.0 RC1 Refresh 2: JayData is a unified data access library for JavaScript developers to query and update data from different sources like webSQL, indexedDB, OData, Facebook or YQL. See it in action in this 6 minutes video: http://www.youtube.com/watch?v=LlJHgj1y0CU RC1 R2 Release highlights Knockout.js integrationUsing the Knockout.js module, your UI can be automatically refreshed when the data model changes, so you can develop the front-end of your data manager app even faster. Querying 1:N relations in W...Christoc's DotNetNuke Module Development Template: 00.00.08 for DNN6: BEFORE USE YOU need to install the MSBuild Community Tasks available from http://msbuildtasks.tigris.org For best results you should configure your development environment as described in this blog post Then read this latest blog post about customizing and using these custom templates. Installation is simple To use this template place the ZIP (not extracted) file in your My Documents\Visual Studio 2010\Templates\ProjectTemplates\Visual C#\Web OR for VB My Documents\Visual Studio 2010\Te...Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.53: fix issue #18106, where member operators on numeric literals caused the member part to be duplicated when not minifying numeric literals ADD NEW FEATURE: ability to create source map files! The first mapfile format to be supported is the Script# format. Use the new -map filename switch to create map files when building your sources.New ProjectsActive Log Reader: The active log reader provides the ability for a client to subscribe to specific changes in a set of files in a directory. For example, it allows you to actively monitor all .log files in your C:\Windows directory (and sub-directories) and callback whenever the word "ERROR" shows up (or any regular expression you can come up with). The accompanying test project outlines example usage.ADO.NET light wrapper: ADO.NET light wrapper is thin IEnumerable layer about ADO.NET for provide easy way to access data with strong typing support. Allen Neighborhood Center: Allen Neighborhood Center data interactionsCildads: The first attempt at centryCMT: Course Management Tool ProjectCode Builder: this is the Builder project.Connect: this is the Connect project.Craig's Framework: A basic framework that is used to speed up building MVC applications and make certain things simpler.CRM 2011 Fetch XML Execute Tool: This is a dev tool used to execute fetch xml to get the results from the connected CRM 2011 instanceDallasDB: A struct based database. DallasDB will have no full functionality until at least version 0.0.1, and won't be ready for professional use until version 1.0.0. EasyMvc: It provides a trainning sample to develop a web application base on MVC3 EF4.0 SQL Compact 4. Besides, a common business permission, logging, configration have been applied simply. Share with some implement idea about web, mvc, jquery,orm. Appreciate your advice.Entity: this is the Entity project.FogLampz: FogLampz is a .NET wrapper around around the FogBugz API.Geeba: Geeba Forum for Students in BGU UniversityHibernate: this is the Hibernate project.JSense - IntelliSense for JavaScript: JSense provides JavaScript IntelliSense meta-automation for Visual Studio 2010 projectsMichael: this is Michael's project.ModAdder: Minecraft Mod InstallerMVVM ORM: The purpose of MVVM ORM is to create models and their interactions as defined in some database for WPF applications Models are derived from tables, views and stored procedures. Interactions include insert/update/delete, with FK relationships taken into account. nihao: The summary is required.Report: this is the Report project.REST Start Kit for BizTalk: This project enables BizTalk Server to expose RESTFul services through the WCF-Custom adapter. The library supports both receive and send, both XML and JSON with all HTTP verbs (GET, POST, PUT and DELETE). The solution is based on two custom WCF behaviors, one to be used on Receive Locations and one on Send Ports. Hopeully you'll find them easy to use, but if you have any issues, please use the discussions forum.RovignetaWinPhone7: bla bla blaScreenShot: A simple utility that enhances the experience of taking screenshots and annotating them. And all of it happens with the screenshot key that you are most used to. PrintScreen. Give it a try. You will forget the traditional tedious screenshot mechanism.SDM Exam 2012: This is an exam project for 4th semester.Struts: this is the Struts project.TheStoreDepot: depot for the StoreTibiaBot: TibiaBot is an open source application dedicated to extend your gaming experience in MMORPG game called Tibia. Besides of very many built-in functions, TibiaBot has implemented IronRuby script engine, which allows You to creating new functionality to base program.TopicInterDisciplinary: Topic inter-disciplinary owner: sherry, chen1984yangWebAppMatrix: ??WebApp??,?????!

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  • How do you use blank lines in your code ?

    - by Matthieu M.
    There has been a few remarks about white space already in discussion about curly braces placements. I myself tend to sprinkle my code with blank lines in an attempt to segregate things that go together in "logical" groups and hopefully make it easier for the next person to come by to read the code I just produced. In fact, I would say I structure my code like I write: I make paragraphs, no longer than a few lines (definitely shorter than 10), and try to make each paragraph self-contained. For example: in a class, I will group methods that go together, while separating them by a blank line from the next group. if I need to write a comment I'll usually put a blank line before the comment in a method, I make one paragraph per step of the process All in all, I rarely have more than 4/5 lines clustered together, meaning a very sparse code. I don't consider all this white space a waste because I actually use it to structure the code (as I use the indentation in fact), and therefore I feel it worth the screen estate it takes. For example: for (int i = 0; i < 10; ++i) { if (i % 3 == 0) continue; array[i] += 2; } I consider than the two statements have clear distinct purposes and thus deserve to be separated to make it obvious. So, how do you actually use (or not) blank lines in code ?

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  • SQL Cruise Alaska 2011

    - by Grant Fritchey
    I had the extreme good fortune to get sent on the last SQL Cruise to Alaska. I love my job. In case you don't what this is, SQL Cruise is a trip on a cruise ship during which you get to attend classes while on the boat, learning all about SQL Server and related topics as well as network with the instructors and the other Cruisers. Frankly, it's amazing. Classes ran from Monday, 5/30, to Saturday, 6/4. The networking was constant, between classes, at night on cruise ship, out on excursions in Alaskan rainforests and while snorkeling in ocean waters. Here's a run down of the experience from my point of view. Because I couldn't travel out 2 days early, I missed the BBQ that occurred the day before the cruise when many of the Cruisers received their swag bags. Some of that swag came from Red Gate. I researched what was useful on a cruise like this and purchased small flashlights and binoculars for all the Cruisers. The flashlights were because, depending on your cabin, ships can be very dark. The binoculars were so that the cruisers could watch all the beautiful landscape as it flowed by. I would have liked to have been there when the bags were opened, but I heard from several people that they appreciated the gifts. Cruisers "In" the hot tub. Pictured: Marjory Woody, Michele Grondin, Kyle Brandt, Grant Fritchey, John Halunen Sunday I went to board the ship with my wife. We had a bit of an adventure because I messed up our documents. It all worked out and we got on board to meet up at the back of the boat at one of the outdoor bars with the other Cruisers, thanks to tweets letting everyone know where to go. That was the end of electronic coordination on the trip (connectivity in Alaska was horrible for everyone except AT&T). The Cruisers were a great bunch of people and it was a real honor to meet them and get to spend time with them. After everyone settled into their cabins, our very first activity was a contest, sponsored by Red Gate. The Cruisers, in an effort to get to know each other and the ship, were required to go all over taking various photographs, some of them hilarious. The winning team of three would all win prizes. Some of the significant others helped out and I tagged along with a team that tied for first but lost the coin toss. The winning team consisted of Christina Leo (blog|twitter), Ryan Malcom (twitter), Neil Hambly (blog|twitter). They then had to do math and identify the cabin with the lowest prime number, oh, and get a picture of it and be the first to get back up to the bar where we were waiting. Christina came in first and very happily carried home an Ipad2. Ryan won a 1TB portable hard drive and Neil won a wireless mouse (picture below, note my special SQL Server Central Friday Shirt. Thanks Steve (blog|twitter)). Winners: Christina Leo, Neil Hambly, Ryan Malcolm. Just Lucky: Grant Fritchey Monday morning classes started. Buck Woody (blog|twitter) was a special guest speaker on this cruise. His theme was "Three C's on the High Seas: Career, Communication and Cloud." The first session was all on Career. I'm not going to type out all my notes from the session, but let's just say, if you get the chance to hear Buck talk about how to manage your career, I suggest you attend. I have a ton of blog posts that I'll be putting together over the next several months (yes, months) both here and over on ScaryDBA. I also have a bunch of work I'm going to be doing to get my career performance bumped up a notch or two (and let's face it, that won't be easy). Later on Monday, Tim Ford (blog|twitter) did a session on DMOs. Specifically the session was on Tim's Period Table of DMOs that he has put together, and how to use some of the more interesting DMOs in your day to day job. It was a great session, packed with good information. Next, Brent Ozar (blog|twitter) did a session on how to monitor and guide SAN configuration for the DBA that doesn't have access to the SAN. That was some seriously useful information. Tuesday morning we only had a single class. Kendra Little (blog|twitter) taught us all about "No Lock for Yes Fun".  It was all about the different transaction isolation levels and how they work. There is so often confusion in this area and Kendra does a great job in clarifying the information. Also, she tosses in her excellent drawings to liven up the presentation. Then it was excursion time in Juneau. My wife and I, along with several other Cruisers, took a hike up around the Mendenhall Glacier. It was absolutely beautiful weather and walking through the Alaskan rain forest was a treat. Our guide, Jason, was a great guy and it was a good day of hiking. Wednesday was an all day excursion in Skagway. My wife and I took the "Ghost and Good Time Girls" walking tour that ended up at a bar that used to be a brothel, the Red Onion. It was a great history of the town. We went back out and hit a few museums and exhibits. We also hiked up the side of the mountain to see the Dewey Lake and some great views of the town. Finally we hiked out to the far side of town to see the Gold Rush cemetery. Hiking done we went back to the boat and had a quiet dinner on our own. Thursday we cruised through Glacier Bay and saw at least four different glaciers including sitting next to the Marjory Glacier for  about an hour. It was amazing. Then it got better. We went into class with Buck again, this time to talk about Communication. Again, I've got pages of notes that I'm going to be referring back to for some time to come. This was an excellent opportunity to learn. Snorkelers: Nicole Bertrand, Aaron Bertrand, Grant Fritchey, Neil Hambly, Christina Leo, John Robel, Yanni Robel, Tim Ford Friday we pulled into Ketchikan. A bunch of us went snorkeling. Yes, snorkeling. Yes, in Alaska. Yes, snorkeling in the ocean in Alaska. It was fantastic. They had us put on 7mm thick wet suits (an adventure all by itself) so it was basically warm the entire time we were in the water (except for the occasional squirt of cold water down my back). Before we got in the water a bald eagle flew up and landed about 15 feet in front of us, which was just an incredible event. Then our guide pointed out about 14 other eagles in the area, hanging out in the trees. Wow! The water was pretty clear and there was a ton of things to see. That was absolutely a blast. Back on the boat I presented a session called Execution Plans: The Deep Dive (note the nautical theme). It seemed to go over well and I had several good questions come out of the session that will lead to new blog posts. After I presented, it was Aaron Bertrand's (blog|twitter) turn. He did a session on "What's New in Denali" that provided a lot of great information. He was able to incorporate new things straight out of Tech-Ed, so this was expanded beyond his usual presentation. The man really knows what he's talking about and communicates it well. Saturday we were travelling so there was time for a bunch of classes. Jeremiah Peschka (blog|twitter) did a great overview of some of the NoSQL databases and what they should be used for. The session was called "The Database is Dead" but it was really about how there are specific uses for these databases that SQL Server doesn't fill, but also that these databases can't replace SQL Server in other areas. Again, good material. Brent Ozar presented again with a session on Defensive Indexing. It was an overview of how indexes work and a deep dive into how to apply them appropriately in your databases to better support access. A good session, as you would expect. Then we pulled into Victoria, BC, in Canada and had a nice dinner with several of the Cruisers, including Denny Cherry (blog|twitter). After that it was back to Seattle on Sunday. By the way, the Science Fiction Museum in Seattle isn't a Science Fiction Museum any more. I was very disappointed to discover this. Overall, it was a great experience. I'm extremely appreciative of Red Gate for sending me and for Tim, Brent, Kendra and Jeremiah for having me. The other Cruisers were all amazing people and it was an honor & privilege to meet them and spend time with them. While this was a seriously fun time, it was also a very serious training opportunity with solid information coming from seasoned industry pros.

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  • RAID1 rebuild fails due to disk errors

    - by overlord_tm
    Quick info: Dell R410 with 2x500GB drives in RAID1 on H700 Adapter Recently one of drives in RAID1 array on server failed, lets call it Drive 0. RAID controller marked it as fault and put it offline. I replaced faulty disk with new one (same series and manufacturer, just bigger) and configured new disk as hot spare. Rebuild from Drive1 started immediately and after 1.5 hour I got message that Drive 1 failed. Server was unresponsive (kernel panic) and required reboot. Given that half hour before this error rebuild was at about 40%, I estimated that new drive is not in sync yet and tried to reboot just with Drive 1. RAID controller complained a bit about missing RAID arrays, but it found foreign RAID array on Drive 1 and I imported it. Server booted and it runs (from degraded RAID). Here is SMART data for disks. Drive 0 (the one that failed first) ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE 1 Raw_Read_Error_Rate POSR-K 200 200 051 - 1 3 Spin_Up_Time POS--K 142 142 021 - 3866 4 Start_Stop_Count -O--CK 100 100 000 - 12 5 Reallocated_Sector_Ct PO--CK 200 200 140 - 0 7 Seek_Error_Rate -OSR-K 200 200 000 - 0 9 Power_On_Hours -O--CK 086 086 000 - 10432 10 Spin_Retry_Count -O--CK 100 253 000 - 0 11 Calibration_Retry_Count -O--CK 100 253 000 - 0 12 Power_Cycle_Count -O--CK 100 100 000 - 11 192 Power-Off_Retract_Count -O--CK 200 200 000 - 10 193 Load_Cycle_Count -O--CK 200 200 000 - 1 194 Temperature_Celsius -O---K 112 106 000 - 31 196 Reallocated_Event_Count -O--CK 200 200 000 - 0 197 Current_Pending_Sector -O--CK 200 200 000 - 0 198 Offline_Uncorrectable ----CK 200 200 000 - 0 199 UDMA_CRC_Error_Count -O--CK 200 200 000 - 0 200 Multi_Zone_Error_Rate ---R-- 200 198 000 - 3 And Drive 1 (the drive which was reported healthy from controller until rebuild was attempted) ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE 1 Raw_Read_Error_Rate POSR-K 200 200 051 - 35 3 Spin_Up_Time POS--K 143 143 021 - 3841 4 Start_Stop_Count -O--CK 100 100 000 - 12 5 Reallocated_Sector_Ct PO--CK 200 200 140 - 0 7 Seek_Error_Rate -OSR-K 200 200 000 - 0 9 Power_On_Hours -O--CK 086 086 000 - 10455 10 Spin_Retry_Count -O--CK 100 253 000 - 0 11 Calibration_Retry_Count -O--CK 100 253 000 - 0 12 Power_Cycle_Count -O--CK 100 100 000 - 11 192 Power-Off_Retract_Count -O--CK 200 200 000 - 10 193 Load_Cycle_Count -O--CK 200 200 000 - 1 194 Temperature_Celsius -O---K 114 105 000 - 29 196 Reallocated_Event_Count -O--CK 200 200 000 - 0 197 Current_Pending_Sector -O--CK 200 200 000 - 3 198 Offline_Uncorrectable ----CK 100 253 000 - 0 199 UDMA_CRC_Error_Count -O--CK 200 200 000 - 0 200 Multi_Zone_Error_Rate ---R-- 100 253 000 - 0 In extended error logs from SMART I found: Drive 0 has only one error Error 1 [0] occurred at disk power-on lifetime: 10282 hours (428 days + 10 hours) When the command that caused the error occurred, the device was active or idle. After command completion occurred, registers were: ER -- ST COUNT LBA_48 LH LM LL DV DC -- -- -- == -- == == == -- -- -- -- -- 10 -- 51 00 18 00 00 00 6a 24 20 40 00 Error: IDNF at LBA = 0x006a2420 = 6956064 Commands leading to the command that caused the error were: CR FEATR COUNT LBA_48 LH LM LL DV DC Powered_Up_Time Command/Feature_Name -- == -- == -- == == == -- -- -- -- -- --------------- -------------------- 61 00 60 00 f8 00 00 00 6a 24 20 40 00 17d+20:25:18.105 WRITE FPDMA QUEUED 61 00 18 00 60 00 00 00 6a 24 00 40 00 17d+20:25:18.105 WRITE FPDMA QUEUED 61 00 80 00 58 00 00 00 6a 23 80 40 00 17d+20:25:18.105 WRITE FPDMA QUEUED 61 00 68 00 50 00 00 00 6a 23 18 40 00 17d+20:25:18.105 WRITE FPDMA QUEUED 61 00 10 00 10 00 00 00 6a 23 00 40 00 17d+20:25:18.104 WRITE FPDMA QUEUED But Drive 1 has 883 errors. I see only few last ones and all errors I can see look like this: Error 883 [18] occurred at disk power-on lifetime: 10454 hours (435 days + 14 hours) When the command that caused the error occurred, the device was active or idle. After command completion occurred, registers were: ER -- ST COUNT LBA_48 LH LM LL DV DC -- -- -- == -- == == == -- -- -- -- -- 01 -- 51 00 80 00 00 39 97 19 c2 40 00 Error: AMNF at LBA = 0x399719c2 = 966203842 Commands leading to the command that caused the error were: CR FEATR COUNT LBA_48 LH LM LL DV DC Powered_Up_Time Command/Feature_Name -- == -- == -- == == == -- -- -- -- -- --------------- -------------------- 60 00 80 00 00 00 00 39 97 19 80 40 00 1d+00:25:57.802 READ FPDMA QUEUED 2f 00 00 00 01 00 00 00 00 00 10 40 00 1d+00:25:57.779 READ LOG EXT 60 00 80 00 00 00 00 39 97 19 80 40 00 1d+00:25:55.704 READ FPDMA QUEUED 2f 00 00 00 01 00 00 00 00 00 10 40 00 1d+00:25:55.681 READ LOG EXT 60 00 80 00 00 00 00 39 97 19 80 40 00 1d+00:25:53.606 READ FPDMA QUEUED Given those errors, is there any way I can rebuild RAID back, or should I make backup, shutdown server, replace disks with new ones and restore it? What about if I dd faulty disk to new one from linux running on USB/CD? Also, if anyone have more experiences, what could be causes for those errors? Crappy controller or disks? Disks are about 1 year old, but it is pretty unbelievable to me that both would die within so short timespan.

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