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• Cheapest way to connect 20-24 Sata II HDDs in a budget storage server?

  - by Joe Hopfgartner

  I need to assemble a high density storage server for as cheap as possible. It's been a while for me and the last systems I integrated didn't even have Sata yet... During my Research I of course stumbled about Nexsan SATA Beast, the BackBlaze storage Pods as well as some ridiculously overpriced HP Proliant or Dell storage solutions. Finally I choose Norco cases as the way to go. My eye is set on the RPC-4020, which is a 4U 19" Rackmount case with 20 Hot Swap 3.5" SATA/SAS Hdd trays (Backplanes included) and room for two 2.5" OS drives as well as a Slim Line CD-Rom. The backplanes connect with a single SATA port for each drive, so there are 20 internal SATA ports to to be connected. They also have redundant power ports which I think is quite nice. The cheapest price I have found is 290$ + 40$ shipping. In europe the cheapest unfortunately is 370€ (500$) + 40 € shipping... A nice alternative would be the RPC-4224 which has SFF-8087 Mini SAS connectors that bundle 4 SATA trays each. But it doesn't seem to be available in Europe (where i am) anywhere. So here comes my problem: What Mainboard/Controller to choose to connect them for as cheap as possible while still having nice data rates? I have to say that the server is intended as a Storage server with 1gps connectivity and the data transfer will be distributed very evenly across all drives. I also don't require any raid functionality. This is all done at application level, I just need JBOD. So for example if I go for the RPC 4020 Model I need to connect 20 Storage + 1 OS + 1 CDROM Sata ports. I searched a bit and stumbled across this very low priced controller: http://www.intel.com/products/server/raid-controllers/SASWT4I/SASWT4I-overview.htm They sell it for 115 € here and the specs say it can control up to 122 hard discs and has 4 Mini SAS connectors. So I would use 4 Mini SAS 36pin - 4 SATA 7pin cables to connect 4 SATA drives to each port and choose a Mainboard taht has 6 SATA on board (for example this one) and hurray, I can connect my 22 SATA devices for as low as about ~ 220 EUR (cpu, ram, psu, case not counted) Question: WOULD THAT WORK? And if not, why? 2nd Question: If I go for the 4220 or 4224 Model, I have internal Mini SAS connectors. Am I right in assuming that the backplane than acts as a "SAS Expander"? And can I just plug these SAS connectors into any SAS port I can find on my controller / mainboard or are there certain requirements? I know that SATA port multipliers only work with controllers that are ready for that. But isn't this expansion already implemented in the SAS standard? I am sorry that this is a very broad question, but I really spent the last week reading up and it seems to be not so clear! Especially all the controlling hardware specifications! 3rd Question: A lot of hardware specs feature "internal channels" and "internal connectors". The connecors are the physical numbers of places where I can plug a cable in. I got that. But are the "internal channels" always the maximum numbers of physical drives that can be used in the end? Or can I enhance this further by Expanders/Fanouts? 4th and last question: What do you think about the setup so far? Do you know any good alternatives? Maby I am completely going the wrong way and some DAS would be way better? Are there any comparable chassis available in europe? Please feel free to say whatever you think is relevant to the subject!

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• Blu-ray BD-R: Would you physically store it in a CaseLogic Wallet pocket?

  - by Rob

  I keep several backup copies of my material and files. For my DVDs, one set of copies is kept in a CaseLogic wallet folder pack, so that I can easily move this around when visiting friends, family or for business. This is highly convenient. The other sets are kept in their jewel cases in hard plastic see thru storage boxes. Although CaseLogic wallet material is designed to be abrasion free, their caveat is that external dust will be the cause of any blemishes. If hard dust gets in these pockets, which is inevitable, this will occasionally cause light hair like scratches on the disc surface as the discs are removed and returned for access to their contents. This is of no consequence as the laser and error correction can more than cope with this. I'm aware that the blu-ray spec requires anti-scratch in disc surfaces but was wondering that, given the smaller pits, would dust and light scratches from wallet storage cause more problems with blu-rays than they would with DVDs? I'm using Blu-ray BD-R and BD-R DL write once media.

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• Fast distributed filesystem for a large amounts of data with metadata in database

  - by undefined hero

  My project uses several processing machines and one storage machine. Currently storage organized with a MSSQL filetable shared folder. Every file in storage have some metadata in database. Processing machines executes tasks for which they needed files from storage and their metadata. After completing task, processing machine puts resulting data back in storage. From there its taken by another processing machine, which also generates some file and put it back in storage. And etc. Everything was fine, but as number of processing machines increases, I found myself bottlenecked myself with storage machines hard drive performance. So I want processing machines to put files in distributed FS. to lift load from storage machines, from which they can take data from each other, not only storage machine. Can You suggest a particular distributed FS which meets my needs? Or there is another way to solve this problem, without it? Amounts of data in FS in one time are like several terabytes. (storage can handle this, but processors cannot). Data consistence is critical. Read write policy is: once file is written - its constant and may be only removed, but not modified. My current platform is Windows, but I'm ready to switch it, if there is a substantially more convenient solution on another one.

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• Trouble cloning a Macbook Pro hard drive

  - by Mirko Froehlich

  I am trying to upgrade the 250GB hard drive in my MacBook Pro (early 2008 model) to a 750GB drive. I have connected the new drive via an external USB enclosure. The drive is recognized fine, I can format it, etc. However, every time I try to clone the drive, I am getting Input/Output errors. Before the clone operation, I have verified both the internal and the external drive using Disk Utility, and they both check out fine. After the clone operation, the external drive shows multiple "Invalid node structure" errors: I have tried two approaches for cloning the drive: Using Disk Utility, by starting from the OSX install DVD Using Carbon Copy Cloner The outcome is the same in both cases. The Carbon Copy Cloner logs show a handful of the following types of errors: rsync: mkstemp "<... an external filename ...>" failed: Input/output error (5) rsync: stat "<... an external filename ...>" failed: Input/output error (5) The actual files affected seem to be different across different runs of the application. Before the last run, I used Disk Utility to (once more) reformat the external drive and explicitly overwrite it with zeros, but this made no difference. I also tried running a surface scan in Tech Tool Pro overnight. It got about 2/3 of the way through before I had to disconnect the drive (had to take my MacBook Pro to work), but so far it didn't report any bad blocks. Assuming it scans the drive in the same order in which blocks would be allocated during actual use, it seems like if bad blocks were to blame for the clone failures, they should have been found already (given that the source drive is only 250GB). As a last attempt, I may try SuperDuper as well, although my understanding is that it uses the same underlying rsync approach as Carbon Copy Cloner, so it's unlikely to perform any better. Are there any other things I should try before I send the drive in for a replacement? Could these problems be caused by my internal drive, even though it works fine and checks out fine in Disk Utility?

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• How would I setup iMail to forward a user's mail to another service w/o leaving a copy locally?

  - by Scott Mayfield

  I have an iMail 2006 server installation in which I have a particular user that has several aliases that all point to a single user (me, for the record). I've been copying all of my mail to GMail and reading it there, but it annoys me that I have to go back weekly and log into my mail account on iMail and delete between 6 and 10 thousand copies of messages I've already received, in order to keep my mailbox from filling up (yes, I have it set with no quota, but I consider it bad form to just let the box grow indefinitely). I've got the copying setup via an inbound user rule, but I'm wondering how to accomplish a "copy and delete" rule. The manual isn't clear on what happens with multiple matching rules (will they be processed in order, or is it a first match situation?) and there isn't a means to combine multiple actions into a single rule. If I use the "forward" action, I THINK that it's going to screw up all the sender information once the mail reaches my GMail account and show it as coming from me instead of the original senders (can anyone confirm that this is accurate?) An easy answer would be to delete my user account entirely, replace it with an alias that maps to my GMail account, but then I would lose my ability to log into the system for admin duties. So that leads me to creating a second, lesser known account for admin use, but since it's a real account, sooner or later I'm going to get mail sent to it and I'll be back to the same situation of having a user account that doesn't get emptied periodically. I imagine I can set the quota to 0 MB to cause all incoming mail to my admin account to bounce, or setup an inbound rule to bounce everything, but this is starting to sound kludgy to me. Does anyone know of a more direct work around to copying a user's incoming mail to an outside server and then deleting the local copy w/o removing their account entirely? Or is this just wishful thinking? Thanks in advance. Scott

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• Is my laptop battery dead?

  - by Josh

  Recently my laptop battery will get extremely hot (definitely hotter than it should get) when I charge it. After that I usually end up removing it once it's fully charged to let it cool down, which takes a couple hours... Question is, is my battery dead? My last battery I had that died just ended up lasting 2 - 3 minutes on battery, no weird heat issues. And is there any way to possibly fix this? Probably not but I won't be able to get a replacement anytime soon. UPDATE: A few days ago when this happened and it cooled down, assuming it was fully charged, I ran my laptop on battery, and the battery life lasted about 10 minutes and then the laptop shutdown. I then plugged it in later and charged it back up, and for a while I had a orange light blinking on my laptop - which I assumed meant the battery was dead, especially since I got 10 minutes battery life. Then today, I turned my laptop on and was surprised to see that the battery was at 20% and charging (it's been plugged in since the incident above, so it should have been fully charged when I shut it off) I let it charge up, and as usual it got pretty hot around the time it was fully charged. So I turned my laptop off and pulled the battery out to let it cool down Now the thing is, just now I tried running it on battery, and it's been going for an hour now... so maybe its not dead? (also the orange light is no longer blinking...) Thanks in advance if anyone knows whats going on, and how to fix it, if its fixable =] EDIT: Some info if it helps... my laptop is about 2 years ago, and it's an Asus K50ID. I know laptop batteries usually don't last more than a year but I'm trying to keep this one going for as long as I can.

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• pfSense router on a LAN with two gateways

  - by JohnCC

  I have a LAN with an ADSL modem/router on it. We have just gained an alternative high-speed internet connection at our location, and I want to connect the LAN to it, eventually dropping the ADSL. I've chosen to use a small PFSense box to connect the LAN to the new WAN connection. Two servers on the LAN run services accessible to the outside via NAT using the single ADSL WAN IP. We have DNS records which point to this IP. I want to do the same via the new connection, using the WAN IP there. That connection permits multiple IPs, so I have configured pfSense using virtual IP's, 1:1 NAT and appropriate firewall rules. When I change the servers' default gateway settings to the pfSense box, I can access the services via the new WAN IPs without a problem. However, I can no longer access them via the old WAN IP. If I set the servers' default gateway back to the ADSL router, then the opposite is true - I can access the services via the ADSL IP, but not via the new one. In the first case, I believe this is because an incoming SYN packet arrives at the ADSL WAN IP, and is NAT'd and sent to the internal IP of the server. The server responds with a SYN/ACK which it sends via its default gateway, the pfSense box. The pfSense box sees a SYN/ACK that it saw no SYN for and drops the packet. Is there any sensible way around this? I would like the services to be accessible via both IPs for a short period at least, since once I change the DNS it will take a while before everyone picks up the new address.

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• Lucid Lynx login issue

  - by Bart Silverstrim

  Recently upgraded from Karmic to Lynx. Upgrade seemed to go well, no noticeable issues. I logged in, and my window manager wasn't starting. An application would appear, but sans control buttons and border, so figured the windows manager needed to be given a swift kick. Opened a web browser and a quick google had me run "metacity --replace &" and everything popped up. I re-ran the Compiz configuration tool to enable my rotating desktop cube to the way I liked it, and had to reconfigure my desktop switcher to the right number of desktops (although the first time I ran it, it crashed on the panel and reloaded...odd, but once it relaunched it seemed fine.) Today I installed updates, rebooted and logged in for the second time since my upgrade. Again, the window manager was dead, and my compiz settings were gone, and the workspaces were set back to four (and when I clicked on the preferences to change them, it crashed on the panel and reloaded again). Resetting everything made things look somewhat normal again. I'm guessing it'll work until I reboot again. Googling around isn't turning up similar complaints about Lucid Lynx and the window manager. Before I go deleting preference files, anyone else know of this kind of issue and what could be done about it? Or should I start taking the stab in the dark approach of deleting preference files hoping one of them is corrupt or has something unsupported in it that's throwing LL for a loop?

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• Diagnosing PCI issues

  - by dtsazza

  I'm upgrading a PC for a friend, and have run into a problem with upgrading the motherboard. I've been assembling custom PCs for the best part of a decade now, so I'm happy enough with the basics at the very least. The motherboard, CPU and graphics card were all updated at once - after this was done, the machine POSTs but the PCI wireless card, as well as the PCI-E graphics card, do not seem to be recognised at all by the system. No trace of them anywhere in the BIOS, or the POST output, or in Windows. I booted into Linux and ran an lspci which also showed up no sign of them. What is the best step to go about diagnosing this? Is it likely/feasible that the motherboard's PCI bus is just defective and it needs to be RMAed? Are there any other common gotchas that might cause these symptoms? For reference, the components in question are: CPU: Celeron E1400 Motherboard: Gigabyte GA-G31M-ES2L Graphics card: TBC (a low end card from a couple of years ago; worked flawlessly before the mobo change) PCI WNIC: Edimax 7128G Thanks in advance for any help.

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• Truncated content with Apache on Vagrant VM

  - by Nev Stokes

  I'm using Vagrant to run a CentOS VM in order to try and achieve local development parity with our live servers. I've symlinked /var/www/html with the /vagrant shared directory and am forwarding port 80 for viewing at http://localhost:4567. I'm developing using SublimeText 2 on OS X Mountain Lion. Once I figured that iptables was tripping me up, all was well and good. Until I noticed something strange. I have a sample HTML page consisting of several paragraphs of lorem copy. I can view this fine in a browser on OS X. But when I make an edit, for example removing a paragraph, and refresh the content is truncated with the paragraph I deleted still visible. When I cat the files on the server I can see the changes I made but these aren't even reflected when I curl localhost. I strongly suspect that it's a problem with my Apache settings — with which I didn't really tinker — as the issue doesn't arise when I stop Apache and run sudo python -m SimpleHTTPServer 80 in the directory to view pages instead. What gives?

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• How to fix a bootable USB Kubuntu installation when the drive has maxed out?

  - by NoCatharsis

  I used Universal-USB-Installer-v1.5.1 from PenDriveLinux.com with Kubuntu 10.04 so I could set up my 4GB flash drive as a totally independent installation. Unfortunately, there was an OS upgrade available which Kubuntu downloaded and attempted to install. This, along with some other software, apparently maxed out my drive before I realized it. Now when I try to boot from the drive, everything boots as normal to the OS boot screen where I select "Boot from this Kubuntu USB Installation." The startup process initiates, then stalls about halfway through and hangs indefinitely. I'm guessing the drive is trying to use space it doesn't have and completely stops working. I realize that once the OS upgrade is in place, the old files could be deleted for a potential 700MB space gain. However, I just have no way to get into the OS and complete the upgrade. My main OS is Windows 7. Is there a way I can fix this issue from within Windows without formatting the entire drive and reinstalling Kubuntu from scratch?

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• Change OpenVZ route to pass through ip failover

  - by Kevin Campion

  I have one dedicaced server with its own IP and another IP (failover) who refer to the first. I will wish to change the gateway of a Proxmox virtual machine (openvz) who runs on this dedicaced server to go through the failover IP rather than the ip of host main server. Once connected to a virtual machine, when I do a traceroute VE# traceroute www.google.fr traceroute to www.google.fr (209.85.229.104), 30 hops max, 60 byte packets 1 MY_SERVER_NAME.ovh.net (xxx.xxx.xxx.xxx FIRST_IP_MAIN_SERVER) 0.021 ms 0.010 ms 0.009 ms The first line tells me the ip of host main server. I would like that the traceroute display the second IP failover. VE# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.0.2.1 * 255.255.255.255 UH 0 0 0 venet0 default 192.0.2.1 0.0.0.0 UG 0 0 0 venet0 With iptables HOST# iptables -t nat -L Chain POSTROUTING (policy ACCEPT) target prot opt source destination MASQUERADE all -- anywhere anywhere MASQUERADE all -- anywhere anywhere SNAT tcp -- anywhere 10.10.101.2 tcp dpt:www state NEW,RELATED,ESTABLISHED,UNTRACKED to:SECOND_IP_FAILOVER SNAT all -- 10.10.101.2 anywhere to:SECOND_IP_FAILOVER 10.10.101.2 is the virtual machine IP (interface venet0) Any ideas ?

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• How to make multiple Excel files open in ONE window/instance of Excel 2003 in Win 7

  - by Mark

  I'm running Excel 2003 on my new Windows 7 machine. (There is also a Excel 2010 starter pre installed that I do not use). I'm a heavy user of Excel. I use it all day every day. I often have 10 or 15 sheets open and once and many of them have cell references to each other. I also have a macro file that keeps all my short cuts. On my old W2K machine when I clicked on a .xls file or a shortcut to one to it would open that file in the existing instance of Excel. This is as it should be. I would have many files open, in only one "window" or instance of Excel. All the files could interact with each other, the cross file lookups worked, my macros worked and I could switch between workbooks with CTRL Tab or CTRL F6, I could move tabs from one workbook to another. On the new W7 machine clicking on an icon opens a NEW INSTANCE of Excel every time. This is terribly frustrating. None of my connecting spreadsheets work anymore. My macros don't work. I can't connect files, I can't move tabs. I'm stuck. I can't do my work! I can still open files in one instance by doing a CTRL-O and navigating, but I need to my files to work on a click. I'm guessing this is a flaw in the registry files, possibly because of the starter Excel 2010 that came preloaded on my new machine. Can you walk me through a registry edit to fix this bug? Is there an easier way than a registry edit?

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• Having trouble mapping Sharepoint document library as a Network Place

  - by Sdmfj

  I am using Office 365, Sharepoint Online 2013. Using Internet Explorer these are the steps I have taken: ticked the keep me signed in on the portal.microsoftonline.com page. It redirects me to Godaddy login page because Office 365 was purchased through them. I have added these sites to trusted sites (as well as every page in the process) and chose auto logon in Internet explorer. Once on the document library I open as explorer and copy the address as text. I go to My Computer and right click to add a network place and paste in the document library address. It successfully adds the library as a network place 30% of the time. I can do this same process 3 times in a row and it will fail the first 2 times and then succeeds. It works for a little while and then I get an error that the DNS cannot be found. I need multiple users in our organization to be able to access this document library as if it was a mapped network drive on our local network. Is there an easier way to do this? I may just sync using the One Drive app but thought that direct access to the files without worrying about users keeping their files synced.

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• computer build for extreme tabbed browsing

  - by David Berger

  I'm interested in building or buying a task-specific computer for my brother. His requirements are ridiculously simple: the machine has to be able to wait in hundreds of web-based virtual waiting rooms at once and not crash. To be competitive, he needs to be able to enter the waiting rooms an dauto-refresh them faster. My question is, what priority do I give the different specs? My initial surmise is this: Connection speed (nothing to do with my build, but I kind of think this will be more beneficial than anything I build for him) Memory size -- I don't usually see firefox taking up more than a gig, even when heavily tabbed, but I think one gig for the operating system and two gigs for the browser are necessary. Processor speed -- I think the processor will affect performance, but even something out of date will do what he needs Memory speed/RAM bus -- I doubt this will matter much, but it seems just on this side of irrelevant. Everything else is a non-issue for him. Does this seem to stack up correctly? Also, since he's looking to stay on the cheaper side, and I might end up recommending a refurb to him, is there anything particularly egregious that Vista would do if it came pre-installed? If I build it myself, I'll give him linux, but if I have it shipped to him, I'm not sure I could walk him through the install process for linux, but I probably could walk him through the process to upgrade to Windows 7, if it were somehow worth it.

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• Unable to use OpenGL or install nVidia driver on openSUSE 12.2

  - by djechelon

  I have an ASUS N76VZ laptop with 12.2 openSUSE and GeForce GT650M card. I found that KDE doesn't allow me to use OpenGL rendering. I tried to install nVidia's driver from script but once it writes the xorg.conf file I'm unable to boot desktop. I have the following errors in system log Oct 30 08:28:13 RAYNOR kdm[2727]: X server died during startup Oct 30 08:28:13 RAYNOR kdm[2727]: X server for display :0 cannot be started, session disabled I noticed that the /etc/X11/xorg.conf backup file was empty, so I renamed the new xorg.conf and left none: the desktop booted!!! How can I fix OpenGL rendering with or without driver installation? [Update]: Xorg.0.log says [ 1434.207] compiled for 4.0.2, module version = 1.0.0 [ 1434.207] Module class: X.Org Server Extension [ 1434.207] (II) NVIDIA GLX Module 304.60 Sun Oct 14 20:44:54 PDT 2012 [ 1434.207] (II) Loading extension GLX [ 1434.207] (II) LoadModule: "record" [ 1434.207] (II) Loading /usr/lib64/xorg/modules/extensions/librecord.so [ 1434.207] (II) Module record: vendor="X.Org Foundation" [ 1434.207] compiled for 1.12.3, module version = 1.13.0 [ 1434.207] Module class: X.Org Server Extension [ 1434.207] ABI class: X.Org Server Extension, version 6.0 [ 1434.207] (II) Loading extension RECORD [ 1434.207] (II) LoadModule: "dri" [ 1434.207] (II) Loading /usr/lib64/xorg/modules/extensions/libdri.so [ 1434.207] (II) Module dri: vendor="X.Org Foundation" [ 1434.207] compiled for 1.12.3, module version = 1.0.0 [ 1434.207] ABI class: X.Org Server Extension, version 6.0 [ 1434.207] (II) Loading extension XFree86-DRI [ 1434.207] (II) LoadModule: "nvidia" [ 1434.208] (II) Loading /usr/lib64/xorg/modules/drivers/nvidia_drv.so [ 1434.208] (II) Module nvidia: vendor="NVIDIA Corporation" [ 1434.208] compiled for 4.0.2, module version = 1.0.0 [ 1434.208] Module class: X.Org Video Driver [ 1434.208] (II) NVIDIA dlloader X Driver 304.60 Sun Oct 14 20:24:42 PDT 2012 [ 1434.208] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs [ 1434.208] (++) using VT number 8 [ 1434.320] (EE) No devices detected. [ 1434.320] Fatal server error: [ 1434.320] no screens found [ 1434.320] Please consult the The X.Org Foundation support at http://wiki.x.org for help.

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• Maximum limit of filepointer in php reached and not changeable

  - by mlaug

  I have a server with the current 5.3.x version installed. Since we are running a really simple and small server in php using sockets, that connects to a lot clients using sockets we need to raise the open file limit that has been already done on the server for the user, that runs the server #ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 29879 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 8192 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 29879 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited and we compiled php with --enable-fd-setsize=8192 still we are getting [19-Nov-2012 09:24:23 Europe/Berlin] PHP Warning: socket_select(): You MUST recompile PHP with a larger value of FD_SETSIZE. It is set to 1024, but you have descriptors numbered at least as high as 1024. --enable-fd-setsize=2048 is recommended, but you may want to set it to equal the maximum number of open files supported by your system, in order to avoid seeing this error again at a later date. once in a while in our logs. Anyone knows who to configure the unix server and php correctly to have that working? I found a bug, but that is related to 2006 and marked as "not a bug" https://bugs.php.net/bug.php?id=37025&edit=1

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• RAID6 mdraid -> LVM -> EXT4 root with GRUB2?

  - by Rotonen

  2012-03-31 Debian Wheezy daily build in VirtualBox 4.1.2, 6 disk devices. My steps to reproduce so far: Setup one partition, using the entire disk, as a physical volume for RAID, per disk Setup a single RAID6 mdraid array out of all of those Use the resulting md0 as the only physical volume for the volume group Setup your logical volumes, filesystems and mount points as you wish Install your system Both / and /boot will be in this stack. I've chosen EXT4 as my filesystem for this setup. I can get as far as GRUB2 rescue console, which can see the mdraid, the volume group and the LVM logical volumes (all named appropriately on all levels) on it, but I cannot ls the filesystem contents of any of those and I cannot boot from them. As far as I can see from the documentation the version of GRUB2 shipped there should handle all of this gracefully. http://packages.debian.org/wheezy/grub-pc (1.99-17 at the time of writing.) It is loading the ext2, raid, raid6rec, dosmbr (this one is in the list of modules once per disk) and lvm modules according to the generated grub.cfg file. Also it is defining the list of modules to be loaded twice in the generated grub.cfg file and according to quick Googling around this seems to be the norm and OK for GRUB2. How to get further by getting GRUB2 to actually be able to read the content of the filesystems and boot the system? What am I wrong about in my assumptions of functionality here? EDIT (2012-04-01) My generated grub.cfg: http://pastie.org/3708436 It seems it first makes my /usr logical volume the root and that might be source of the failure? A grub-mkconfig bug? Or is it supposed to get access to stuff from /usr before / and /boot? /boot is on / for me - no separate boot logical volume.

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• Is it possible to boot Windows 7 from when you're harddrive's partition with two OSes?

  - by Muhammad

  I have a PC with a hard drive that's partition into home directories for Windows 7 and Ubuntu. I primarily use Windows 7 and occasionally (once a week) use Ubuntu. When I boot up my computer, I usually get taken to a boot menu that includes about 5 different options: 3 are for Ubuntu's configurations, one's for swap, and the forth is for Windows 7. Then after I select Windows 7 or Ubuntu from this menu, I get taken to another menu that again asks me for Windows 7 or Ubuntu. This time, there's only 2 options, Windows 7 and Ubuntu. [Side note: out of experience I realized most boot menus are timed and so are these.] So if I ever turn my computer on without actually sitting in front of it for a few minutes, it boots into Ubuntu. I'm trying to figure out what I need to do so I can first get rid of the 2 boot menus. And if possible, I'm looking for help changing my boot options where I can load up Windows 7 (even with the boot menu wait of about 30 seconds). My harddrive's partition's laid out like this: Windows 7 (C partition) Multimedia (D partition, I just use this for backup/non-OS stuff) Ubuntu (home directory) Swap Is there any other information I need to provide?

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• What is a long-term strategy to deal with CPU fan dust in my home office?

  - by PaulG

  There are numerous discussions of CPU overheating and how sometimes this can be corrected by removing the dust from the CPU fan. I have read many of these, but I can't find anyone expressing a long-term strategy to deal with this problem. There are some suggestions here, for example, about how often the inside of the computer should be dusted. But I find this generally unsatisfactory. As it stands, in my rather dusty house (heated by a wood stove, with no central air circulation), I need to vacuum out the CPU fan every 3 to 4 months. At high CPU load, this can make a difference between 65C and 100C. I'm tired of hauling out the vacuum every time I anticipate high CPU load. What steps can I take to deal with this systematically in the long-term? Moving my high CPU load computing to the cloud is not a realistic option. Neither is vacuuming my home office more than once a week! (Details: my computer is on the floor in a Cooler Master HAF922 case, and uses an Intel CPU fan on an i7 chip) EDIT: While this would definitely solve the problem (submerging motherboard in mineral oil), it is a bit of an expensive solution.

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• Implications of disabling the AMD Phenom's TLB patch?

  - by DMA57361

  I'm currently running a AMD Phenom X4 9600 processor (yeah, it's aging a bit, but other recent problems mean it's not getting upgraded in the immediate future), which happens to be one of the chips that suffer from the TLB errata. I recall that the first time I played with disabling the TLB patch (probably over a year ago, while playing a game that had a severe performance problem such that it was almost unplayable unless the patch was disabled) I had at least one BSOD, but I can't remeber them being particularly frequent. However, because it decreased instability, I stopped disabling the patch once I was done with the game. Now, after some recent hardware changes I was experiancing much worse performance than expected from the new hardware under some circumstances, and the TLB jumped to mind - after testing I found that disabling the patch would improve the performance to expected levels. I'm now wondering if it's worthwhile always having the patch disabled to avoid any potential slowdowns cropping up in the future, or if it is too dangerous. Everything I read states that the bug, when not patched, can causes a system lock-up in "rare circumstances". So, with the TLB patch disabled: How frequently should system lock-ups be expected? Do we know what the circumstances that trigger the lock-ups are? (Don't worry too much about being highly technical, but essentially I wonder if the chip more vunerable under heavy load, or heavy memory usage, etc?) Are there any secondary problems I should be aware of? (Don't include things that are charateristic to all lock-ups, please)

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• Desktop PC does not power up on power button

  - by hIpPy

  When I press the power button on my desktop, it does not power up completely. Before I press the power button, I see lights on the motherboard. Everything is normal. On power button press, the fans on the cpu, graphics card and motherboard start to spin a little for a second or two and then they stop. No beeps during this process. It has been doing this for a while now but it used to start up after some trials. Once it starts up, I have NO issues at all like random shutdowns so it is not an issue with OS. I'm just guessing here but it seems as if the PSU (Antec TP2-550ATX) is dying out and does not have enough power now - just a guess. It's an old desktop assembled in 2005 but I have maintained it well. Any ideas? Please help. Thanks. Below is the complete configuration. DFI LAN-Party UT NF4 Ultra-D 6/23 {6.70}, Evercool EC-VC-RE 41/47C, AMD Opteron 170 2.0GHz {1.3.2.16} 1.312V 36/41C, ThermalRight SI-120, Panaflo 120×38mm OCZ Platinum 2×1GB 200MHz 2.66V 3-3-2-7 1T XFX 7800GTX 256MB 475/1250MHz {91.31}, Zalman VF900 Cu led 41/56C WD Caviar 320GB 7200RPM 16MB SATA 3Gb/s Antec TP2-550ATX Antec P180 WinXP sp2 KB896256 Logitech MX310 Razer Mantis Speed BenQ FP91G+ 19" LCD 8ms DVI Creative Audigy2 ZS {4.42} BenQ DW1640 Logitech z-5300e 5.1 280W Legend: Driver versions: {} User settings: [] Voltage: V Wattage: W Temperature: C (Celsius) min/max

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• Cable management techniques

  - by cornjuliox

  How do you manage the giant jungle of cables behind your PC? When you have 2 or more PCs next to each other, you wind up with this giant mess cables that's a pain in the neck to clean especially when both computers are running 24/7 and any fidgeting with the cables is likely to cause data loss and/or angry users. So far I've tried masking tape, cable ties and plain old string but none have been very effective. The masking tape kept the cables in place, but over time they ended up leaving this awful sticky residue on the sides of the cables that just won't come off gets all over your fingers and is horrible horrible horrible. I have nightmares about that stuff. We used cable ties and 'folded' up some of the longer cables so that they weren't any longer than they needed to be, but this meant that the position of some of our devices like the keyboard and the mouse were essentially 'fixed' until we removed the ties. The string didn't work much differently and required that we tie them properly or risk it coming loose. I would switch to a wireless keyboard and mouse, but I don't want to have to deal with the added expense of batteries, even the rechargable ones. Plus I don't want them to die on me at a crucial moment (happened to me once while playing Firearms _<). How do large offices and data centers manage their masses of cable?

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• Cable management techniques

  - by cornjuliox

  How do you manage the giant jungle of cables behind your PC? When you have 2 or more PCs next to each other, you wind up with this giant mess cables that's a pain in the neck to clean especially when both computers are running 24/7 and any fidgeting with the cables is likely to cause data loss and/or angry users. So far I've tried masking tape, cable ties and plain old string but none have been very effective. The masking tape kept the cables in place, but over time they ended up leaving this awful sticky residue on the sides of the cables that just won't come off gets all over your fingers and is horrible horrible horrible. I have nightmares about that stuff. We used cable ties and 'folded' up some of the longer cables so that they weren't any longer than they needed to be, but this meant that the position of some of our devices like the keyboard and the mouse were essentially 'fixed' until we removed the ties. The string didn't work much differently and required that we tie them properly or risk it coming loose. I would switch to a wireless keyboard and mouse, but I don't want to have to deal with the added expense of batteries, even the rechargable ones. Plus I don't want them to die on me at a crucial moment (happened to me once while playing Firearms _<). I know that there are people out there with home/office networks a thousand times more convoluted than mine, so

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• DPM 2007 clashing with existing SQL backup job

  - by Paul D'Ambra

  I've recently installed a DPM2007 server on Server 2003 and have set up a protection group against a server 2003 server running SQL 2005 SP3. The SQL server in question has a full backup (as a sql agent job) once a day and transaction log backups hourly. These are zipped up and FTP'd to a server offsite by a scheduled task. Since adding the DPM job I'm receiving many error messages: DPM tried to do a SQL log backup, either as part of a backup job or a recovery to latest point in time job. The SQL log backup job has detected a discontinuity in the SQL log chain for database SERVER_NAME\DB_Name since the last backup. All incremental backup jobs will fail until an express full backup runs. My google-fu suggests that I need to change the full backup my sqlagent job is running to a copy_only job. But I think this means that I can't use that backup with the transaction_logs to restore the database if the building (including the DPM server) burns down. I'm sure I'm missing something obvious and thought I'd see what the hivemind suggests. It is an option to set-up a co-located DPM server elsewhere and have DPM stream the backup but that's obviously more expensive than the current set up. Many thanks in advance

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