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• Samsung 530U3C clean system installation

  - by user1292810

  I have bought Samsung 530U3C notebook with i5-3317/12GB RAM/500GB HDD/24GB ExpressCache/Windows 8 preinstalled. I would like to install my own clean version of Win8. But I would like to preserve recovery partition. I will sell this laptop in probably 1-1.5 year and I would like to be able to restore settings to factory ones. What is more, in the future I would like to install Ubuntu as well, but Windows goes first. At the moment discs and partitions looks like below (sorry for non English screen): http://i.stack.imgur.com/p4W6t.jpg DISC 0: 500MB - recovery partition 300MB - system partition 442.22GB - Drive C: - Boot, Page File, Crash Dump, Primary partition 21.64GB - recovery partition 1.00GB - recovery partition DISC 1: 9.00GB - primary partition 13.24GB - primary partition Which partitions can I format and which of them should I preserve? Can I format and merge partitions from that 24GB ExpressCache and install Windows on it?

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• Where is Amazon Linux AMI Test Page EC2?

  - by fuzzybee

  I have set up my websites as directories directly under /var/www/html/ and they are working just fine (the websites are mapped to virtual hosts). So, this is mainly out of curiosity for the moment. Furthermore, being able to customise this might bring some benefits in the future e.g. branding the elastic IPs my computer use temporarily. Notes I can always create a index.html page under /var/www/html/ and modify it but that's not my goal here. I can also map the elastic IP address to a directory /var/www/html/default/ and do my stuffs there but that is not also my goal here My goal is the find the Amazon Linux AMI test page I've tried running Linux command to find it but it takes too long obviously

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• Forgot Microsoft Virtual PC's password

  - by Kanini

  I have a Microsoft Virtual PC on which I run Windows 2003 Server. I am right now in the system, but have forgotten the password. So, while I can continue to work now, if I were to lock the computer or shut it down, I am locked out. Questions How can I ensure that the Virtual PC automatic lock does not happen? (Giving me time to try and remember the password or for future users, to look up this question!) How can I find out/reset my password?

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• What Excel formats are (most) compatible with LibreOffice and Google Docs?

  - by iconoclast

  I use Excel (and occasionally Numbers), but I want to be able to share with users of Google Docs and LibreOffice (and I may want to switch in the future). What's the most compatible format to save my Excel spreadsheets in? I'm asking as a question here rather than merely Googling for a list of formats that LibreOffice and GoogleDocs support (although I'm doing that too, and will post the answer if no one else does) because there are likely to be hidden "gotchas" that only someone who has experience using all of the above applications is going to know about. Answers that include personal experience will be preferred over those that only post a link to the relevant facts on google.com and libreoffice.com.

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• View httpd/lighttpd modules that are installed on shared hosting

  - by sdek

  I don't have access to the httpd.conf file on this shared host, but I wanted to see which modules are enabled/installed. Is there a (easy) way to find out without access to the httpd.conf file? For example, with PHP you can run a file that has phpinfo() in it to get the PHP info. Anything similar? The web server is lighttpd, which I understand is mostly compatible with apache httpd. (And yes, I am going to email the hosting support, but it sure would be nice to know for the future)

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• Slab uses 88Gb of 128Gb available. What could cause this?

  - by Joris Meys

  We run a debian 2.6.26-2-amd64 x86_64 GNU/Linux on a server with 128 Gb. Recently it our available memory became rather low. Looking at the /proc/meminfo showed that the Slab was using 88Gb, which is counted in the used memory off course. Is this a problem? I suspect that memory will be freed when necessary, but I don't know if that could have unwanted side effects. Why would Slab need that much memory? Is there a clear cause for that? can we avoid this to happen in the future? How can we free this memory? thank you in advance > cat /proc/meminfo MemTotal: 132304500 kB MemFree: 26669388 kB Buffers: 237504 kB Cached: 11881136 kB SwapCached: 48 kB Active: 5244640 kB Inactive: 11714308 kB SwapTotal: 5751228 kB SwapFree: 5750436 kB Dirty: 24 kB Writeback: 0 kB AnonPages: 4840256 kB Mapped: 163968 kB Slab: 88314840 kB SReclaimable: 88275644 kB SUnreclaim: 39196 kB PageTables: 80852 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 71903476 kB Committed_AS: 6818332 kB VmallocTotal: 34359738367 kB VmallocUsed: 505724 kB VmallocChunk: 34359231963 kB

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• Model validation with enumerations

  - by Robert Koritnik

  I'm using DataAnnotations attributes to validate my model objects. My model class looks similar to this: public class MyModel { [Required] public string Title { get; set; } [Required] public List<User> Editors { get; set; } } public class User { public int Id { get; set; } [Required] public string FullName { get; set; } [Required] [DataType(DataType.Email)] public string Email { get; set; } } My controller action looks like: public ActionResult NewItem(MyModel data) { //... } User is presented with a view that has a form with: a text box with dummy name where users enter user's names. For each user they enter, there's a client script coupled with ajax that creates an <input type="hidden" name="data.Editors[0].Id" value="userId" /> for each user entered (enumeration index is therefore not always 0 as written here), so default model binder is able to consume and bind the form without any problems. a text box where users enter the title Since I'm using Asp.net MVC 2 RTM which does model validation instead of input validation I don't know how to avoid validation errors. The thing is I have to use BindAttribute on my controller action. I would have to either provide a white or a black list of properties. It's always a better practice to provide a white list. It's also more future proof. The problem My form works fine, but I get validation errors about user's FullName and Email properties since they are not provided. I also shouldn't feed them to the client (via ajax when user enters user data), because email is personal contact data and is not shared between users. If there was just a single user reference on MyModel I would write [Bind(Include = "Title, Editor.Id")] But I have an enumeration of them. How do I provide Bind white list to work with my model?

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• Did I find a bug in WriteableBitmap when using string literals

  - by liserdarts

  For performance reasons I'm converting a large list of images into a single image. This code does exactly what I want. Private Function FlattenControl(Control As UIElement) As Image Control.Measure(New Size(1000, 1000)) Control.Arrange(New Rect(0, 0, 1000, 1000)) Dim ImgSource As New Imaging.WriteableBitmap(1000, 1000) ImgSource.Render(Control, New TranslateTransform) ImgSource.Invalidate Dim Img As New Image Img.Source = ImgSource Return Img End Function I can add all the images into a canvas pass the canvas to this function and I get back one image. My code to load all the images looks like this. Public Function BuildTextures(Layer As GLEED2D.Layer) As FrameworkElement Dim Container As New Canvas For Each Item In Layer.Items If TypeOf Item Is GLEED2D.TextureItem Then Dim Texture = CType(Item, GLEED2D.TextureItem) Dim Url As New Uri(Texture.texture_filename, UriKind.Relative) Dim Img As New Image Img.Source = New Imaging.BitmapImage(Url) Container.Children.Add(Img) End If Next Return FlattenControl(Container) End Function The GLEED2D.Layer and GLEED2D.TextureItem classes are from the free level editor GLEED2D (http://www.gleed2d.de/). The texture_filename on every TextureItem is "Images/tree_clipart_pine_tree.png" This works just fine, but it's just a proof of concept. What I really need to do (among other things) is have the path to the image hard coded. If I replace Texture.texture_filename in the code above with the string literal "Images/tree_clipart_pine_tree.png" the images do not appear in the final merged image. I can add a breakpoint and see that the WriteableBitmap has all of it's pixels as 0 after the call to Invalidate. I have no idea how this could cause any sort of difference, but it gets stranger. If I remove the call to FlattenControl and just return the Canvas instead, the images are visible. It's only when I use the string literal with the WriableBitmap that the images do not appear. I promise you that the value in the texture_filename property is exactly "Images/tree_clipart_pine_tree.png". I'm using Silverlight 3 and I've also reproduced this in Silverlight 4. Any ideas?

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• Can one have multiple name servers that don't all belong to the same TLD/provider?

  - by Simon

  In light of the GoDaddy outage we updated our name server list for our domain to include an additional name server provider. The list looks something like this: ns61.domaincontrol.com ns54.domaincontrol.com ns1.dreamhost.com ns2.dreamhost.com Both Godaddy and Dreamhost have zone entries to handle the A and MX records. The idea is that if one provider goes out the other will be a fall-back. However, when I tested my config with http://www.intodns.com/ I am getting a warning about SOA serials not being agreed. Have I misunderstood some fundamentals in name-server config? What can I do to prevent future problems?

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• Shutdown in background - PHP

  - by William

  I'm trying to shutdown an Ubuntu machine from PHP and am running into an issue if I want to delay the shutdown. The PHP line I'm using is: exec("sudo shutdown -h +5 &", $output); Where 5 is however many minutes in the future I want to shutdown. My problem is that this won't background and Apache hangs until either the machine is shutdown or someone else cancels the shutdown. shell_exec() has the same result. Is there another way to do this that will return immediately?

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• Virtual memory on Linux doesn't add up?

  - by Brendan Long

  I was looking at System Monitor on Linux and noticed that Firefox is using 441 MB of memory, and several other applications are using 274, 257, 232, etc (adding up to over 3 GB of virtual memory). So I switch over to the Resources tab, and it says I'm using 462 MB of memory and not touching swap. I'm confused. What does the virtual memory amount mean then if the programs aren't actually using it. I was thinking maybe memory they've requested but aren't using, but how would the OS know that? I can't think of any "I might need this much memory in the future" function..

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• Windows Resource Monitoring Programs

  - by Sal

  I work at a small tech start up managing websites with our own in house server side code. (In production, we use Windows Server 2008 boxes, running Java 6. In our dev boxes, we use Windows 7 running Java 7.) Recently, we had an issue where some of our boxes in production failed, and we didn't have means of trouble shooting, since we keep little to no monitoring logs about a given box's CPU/memory/RAM usage, etc. So, I'm wondering if there is some commercial/freeware that's the standard for performance monitoring/logging. Essentially, I'm just looking for an analytics system that is similar to the Windows Task Manager or the Resource Monitor, that serializes all of its data periodically. Ideally, I'd like to find a program that's also extensible, in case I'd like to add addition monitors in the future.

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• Windows Server 2008 Standard vs. Web

  - by Andreas

  I'm currently comparing Windows Server 2008 versions to see what to use. What i found is this, that might affect me: RAM: 32GB. (the same) Sockets: 4 (the same) Remote Desktop: 2 (the same) IIS: true (the same) Application Server: Only standard. I will run my server as a single CPU (4 core) 8GB RAM, 2x raid1 web-server running: IIS Asp.net .Net 4 Third part mail server. (Only for sending mail from my web-application) SQL Server Express (My data is not more then 10 GB) Some minor applications for import and export of data. I might use external load balancer if I install a second machine in the future. My question is if you see any reason for me to go for standard that is 4 x price compared to web. BR Andreas

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• Force initial Google Drive sync with a non-empty folder?

  - by Terrance Shaw

  I upgraded my iMac with an SSD last night and restored from a Time Capsule backup. Everything is now working substantially zippier and overall better, with the exception of one thing: Google Drive refuses to continue to sync with the Google Drive folder that it'd been using before the upgrade, and I ultimately ended up having to just delete the folder and let it resync from scratch to get past its stubborn error (alternatively, I suppose I could've simply moved the contents, set the path to the now-empty folder, then moved them back). Is there any way to get past this particular issue (for future reference), or is it something that Google put in place to ensure that a new user doesn't go and specify their root drive as the backup destination?

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• What am I doing wrong with this cat 6 patch panel wiring?

  - by Max Hodges

  top number is transmitter bottom number is remote terminator 12345678 36145278 is this because I could be mixing T568A and T568B wiring? how do I know if my patch cord is A or B? Do I just look at the plug and match it up with the diagram on the back of the panel somehow? EDIT I read that 36145278 indicates a cross over cable, but I'm not trying to make a cross over. Where did I go wrong? I'm guessing the cable plug is T568A but I wired it to the panel using T568B. So I need to redo it as T568A. But in the future how do I know if I cable is A or B? Cheers!

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• Disable Return key outside textareas on a Asp.Net web page (containing ajax code)

  - by Achim

  Hi, I have an Asp.Net web page, having the common Asp.Net form. The outer "border" of the page (i.e. main menu, header, ...) is build using normal Asp.Net code using a master page. The content of that page uses jQuery to display dynamic forms and to send data to the server. If I push the return key on that page, I jump to a (more or less) random page - which is not what the user expects. ;-) There are some text areas and the user must be able to enter line breaks. Otherwise it would be fine to disable the return key completely. Any bullet proof way to do that? I found some solutions on the web, which capture the keypress event and ignore \x13, but that does not really work. It works as long as the page has just loaded, but as soon as I have clicked on some elements, the return key behaves as usuall. Any hint would be really appreciated! Achim

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• Can I use adsutil.vbs to remove the 'X—Powered-By' response header from IIS6

  - by Anthony

  Can I use adsutil.vbs to remove the 'X—Powered-By' response header from IIS6 configuration? We have a site that is running IIS6. Migration to IIS7 is a few months away at least. In the mean time, I have noticed that it is serving the header X—Powered-By: ASP.NET on all responses. I want this gone, and I would strongly prefer to script this so that future deployments also ensure that the header is not present. Is there a way to do this using adsutil.vbs?

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• What are the benefits of full VDI over Remote Desktop Services?

  - by Doug Chase

  We're talking about piloting VDI here, but the more research I do, the more it seems like it would make more sense just to upgrade and expand our TS (RDS) environment. I feel like you can pull off more sessions per core on RDS than on any VDI solution I've looked at. Is this the case? Is there a decision matrix anywhere describing the benefits of using full virtualized desktops over using a remote desktop farm? We need good video performance for clinical imaging - will this work better on one infrastructure or the other? (Does this question have a specific enough answer for it to be on SF? Regardless, I feel like having this here will be helpful for someone in the future...)

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• Corrupt file indicative of corrupt hard drive?

  - by Elipsicon

  I have noticed that two files on my (almost full) 2 TB hard drive have been corrupted. One file has 20 kB (!) corrupted, i.e. consecutive 20 kB have changed, even though the modification date of the file hasn't changed and I haven't worked with this file for over a year. This tells me that something "below" the file system level has messed with the data and the only thing I can think of is hardware failure, most likely hard disk failure. I've tested my RAM already and it works flawlessly. I'm using ext4 on Linux, if that is of any help. Is this normal? Is it time to change my hard drive disk before something worse happens? What can I do to prevent that from happening in the future? Is there some built-in feature of, or extension to ext4 that includes additional error correcting code and/or watches files for changes that haven't been caused by the OS?

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• Best alternatives to recover lost directories in FAT32 external hard drive?

  - by Sergio

  Hi: I have an 320 GB ADATA CH91 external hard drive. I guess it has some problems with the connector of the USB jack. The point is that in certain occasions it fails in write operations generating data losses. Right now I lost a directory with several GB's of very useful information. Since then I have not attempted to write to the disk any more. What tool would you recommend to recover the lost data? The disk is FAT32 formatted (only one partition) and I use both Linux and Windows. What filesystem format would you recommend to avoid future data losses? I currently only use this external hard drive in Linux so there are several available choices (FAT, NTFS, ext3, ext4, reiser, etc.). Regards, Sergio

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• Why is a ZFS pool not persisting over server restart?

  - by Chance

  I have a ZFS pool with 4 drives. It also has a 3gb ZIL and a 20GB L2ARC that are each partitions on an SDD that doubles as my Linux Mint (ver. 13) boot drive. The pool is mounted to /data. The problem I am running into is that when I restart the server the pool/directory is completely wiped despite having data in it prior. I'm afraid I'm doing something wrong in the setup, which leads me to the following questions: What would cause this? Is there anyway to get the data back? How do I stop it from happening in the future? Thank you in advance! pool: data state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM data ONLINE 0 0 0 raidz2-0 ONLINE 0 0 0 sda1 ONLINE 0 0 0 sdb1 ONLINE 0 0 0 sdc1 ONLINE 0 0 0 sdd1 ONLINE 0 0 0 logs sde4 ONLINE 0 0 0 cache sde3 ONLINE 0 0 0 errors: No known data errors

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• Memcached server: Is it a good practice to point two server urls to the same server?

  - by Niro

  I have a system where there are connections to a memcache server from several different files and servers. I would like to stay with one server but keep the option of increasing the number of memcache servers (for periods of of high traffic). My idea is to tell memcache there are two servers, while the two urls will point (by DNS) to a single server. In the future if I want I can add a server and change DNS without changing the code in many places. Is this a good practice? Is there a performance cost to the fact that there are two server connections but they both point to the same server? Any other idea how to achive instant expeandability of memcache capacity without need to change the code and deploy ?

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• Linux: close a program with command line (not kill it)

  - by CodeNoob

  Some applications only allow one running instance (like eclipse, if you want to use the same workspace). So if I log in from another location, I have to kill/close the application that was open when I previously logged in from another location. I always use kill command to kill the running process. But, if you kill a process, it might not save some states that are useful for future usage. However, if you "close" it properly byclicking on the close button, for example, it will save the states properly. Is there a way to properly "close" an application from command line? I know this can vary from applications, so let's be a bit more generic: how to send a signal to another running application, and this signal works just as if we click the "close" button in the top bar? thanks!

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• Upgrade to Genuine Windows 8 Pro from non genuine Windows 7

  - by mark

  I have a computer with non-genuine windows 7 (cracked with windows loader). I was thinking of buying / upgrading to Windows 8 Pro. I ran Windows8-UpgradeAssistant.exe and was said that I can upgrade to Windows 8 Pro. Can I perform a clean upgrade (format and install) from my current windows 7 to windows 8? In future, in order to re-install Windows 8 do I need to re-install the non-genuine Windows 7 and install on top of it? If my hard disk crash, or I want to install on a new hard disk (clean install), do I need to install windows 7 again before upgrading to Windows 8? If I don't like Windows 8, can I downgrade to Windows 7 genuine?

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• How do you create large, growable, shared filesystems on Linux at AWS?

  - by Reece

  What are acceptable/reasonable/best ways to provide large, growable, shared storage at AWS, exposed as a single filesystem? We're currently making 1TB EBS volumes ~biweekly and NFS exporting with no_subtree_check and nohide. In this setup, distinct exports appear under a single mount on the client. This arrangement does not scale well. The options we've considered: LVM2 with ext4. resize2fs is too slow. Btrfs on Linux. not obviously ready for prime time yet. ZFS on Linux. not obviously ready for prime time yet (although LLNL uses it) ZFS on Solaris. future of this combo is uncertain (to me), and new OS in the mix glusterfs. heard mostly good but two scary (and maybe old?) stories. The ideal solution would provide sharing, a single fs view, easy expandability, snapshots, and replication. Thanks for sharing ideas and experience.

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