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  • Why does unpartitioned Hitachi HDS5C3020 drive start consuming 50% more power 15 minutes after boot?

    - by Pro Backup
    In a Debian 6.0.6 system there are 74 pieces of 2TB Toshiba DT01ABA200 drives. These drives are identified as Hitachi HDS5C3020BLE630 drives running firmware revision MZ4OAAB0. 64 Drives attached via HP SAS expander cards to an LSI 2008 SAS controller, another 5 drives are connected directly to the mainboard, 4 drives are connected to a Sil based PCI controller and last 1 drive is only powered and has no data cable connected. The controller LSI and Sil card's their onboard BIOS are both disabled and the mpt2sas and sata_sil modules are removed from the Linux debian 2.6.32-5-amd64 #1 SMP Sun Sep 23 10:07:46 UTC 2012 x86_64 GNU/Linux kernel. The mpt2sas module is loaded after boot using a modprobe command in /etc/rc.local. These 74 drives are not partitioned, neither formatted and also not mounted. The system consumes: with 0 drives: 70.6 - 70.9 Watt (also 15 minutes after boot); with 74 drives: 330 - 360 Watt, just after boot (is equivalent to 3.5 - 3.9W per drive in idle state); with 74 drives: 420 - 466 Watt, each time in the 15th minute of uptime (is equivalent to 4.7 - 5.3W per drive in idle state). The drive specification lists 4.7W as read/write, and 3.3W as idle power consumption. The increased power consumption is most likely on the 5V line, because after roughly 1 minute an "over current protection" (OCP) of the power supply (PSU) shuts down the power. The used PSU is a single rail model with an OCP of 122A on the 12V line and 55A on the 5V line. Regression: It doesn't matter whether the drive its APM value is set to disabled or 1 (maximum power saving). The operating system records no read/write activity in /proc/diskstats. The values there are identical (28 read, 0 write operations) as immediately after the modprobe operation. Can't test what happens when booting into the mainboard it's BIOS - to exclude any OS intervention - because the Super Micro X8SI6-F mainboard running firmware 06/27/12 has a bug that incorrectly reads a +74.0 C CPU sensor temperature as "High" in BIOS mode, and shuts down the power after 1 minute. What might be causing the drive read/write activity on all drives in the 15th minute after boot and how to prevent it from happening?

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  • Visio-like design software?

    - by OverTheRainbow
    A friend of mine is looking for an equivalent on Macintosh to Visio or SmarDraw to draw plans for home improvements. I don't know anything about Macintosh, so would appreciate any feedback on good softwares for this type of applications.

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  • Paint Shop Pro-like open-source software?

    - by overtherainbow
    I need to add shapes that have been available in Paint Shop Pro since version 7 like curved arrows, etc. I gave Paint.Net and IrfanView a try, but they don't seem to support more sophisticated shapes than straight lines, circles, or rectangles. If this is correct, does someone know of a PSP-equivalent open-source solution for Windows? Thank you.

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  • Amazon EC2 tools for Debian?

    - by Jonik
    What is the recommended way of getting command-line Amazon EC2 tools on Debian? So, basically the same as this question, but for EC2 instead of S3. Ubuntu has ec2-ami-tools and ec2-api-tools, but I couldn't find equivalent packages for Debian. A blog post titled "Install EC2 AMI & API tools in Debian" talks about installing Amazon's packages outside package management, but that seems a little clumsy.

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  • Does bash have a hook that is run before executing a command?

    - by Gilles
    In bash, can I arrange for a function to be executed just before running a command? There is $PROMPT_COMMAND, which is executed before showing a prompt, i.e., just after running a command. Bash's $PROMPT_COMMAND is analogous to zsh's precmd function; so what I'm looking for is a bash equivalent to zsh's preexec. Example applications: set your terminal title to the command being executed; automatically add time before every command.

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  • How can I set environment variables for a graphical login on linux?

    - by Ryan Thompson
    I'm looking for a way to set arbitrary environment variables for my graphical login on linux. I am not talking about starting a terminal and exporting environment variables within the terminal, because those variables only exist within that one terminal. I want to know how to set an environment variable that will apply to all programs started in my graphical session. In other words, what's the Xorg equivalent of ~/.bash_login?

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  • Media Archive System with branches?

    - by Ian McEwen
    In short, how can I get VCS features (revisioning, branching, and deduplication) for a media collection that's far too large for most/all VCS systems? Background I have a 300GB music folder; unfortunately, I only have the hard drive space for this on my desktop system. However, a good portion of my collection is FLAC; therefore, I could theoretically have a space-optimized version in which I transcode all the FLAC to mp3 or some other lossy format, and use only that version on the laptop. However, a portion of my collection isn't FLAC. And that which isn't FLAC shouldn't be transcoded to an equivalent format; it won't have any space savings, which is the point. Moreover, it shouldn't be duplicated: the mp3/ogg portions of the collection should probably be exactly the same files. Thoughts One solution is to have format-specific organization of my music folders, and use some script to transcode the FLAC directory to mp3 or such into another directory. Another is some sort of hack using entirely separate copies and symbolic links for deduplication, or something similar. But these also have a disadvantage of lacking versioning; I'd like to be able to reorganize my music collection, retag things, etc. and save history. This isn't key, but would be awfully nice. I can't see it as entirely unreasonable to set up VCS hooks or something equivalent to keep directory structure synced between two copies, update tags, and transcode FLAC automatically into the space-optimized copy. Basically, the system I really want is a version control system. Two branches: one archival/desktop branch including the FLAC, one space-optimized/laptop branch without it; most VCSes would deal well with whole chunks being the same files well by compressing in a reasonable way (i.e. don't keep two copies of the same data). I could also do a lot of what I talk about above with hooks. But I don't know of any VCS that would deal with a 300GB repository with almost 20k files. Many of them would just not even initialize the whole affair; others would just do it inexpressibly slowly or otherwise badly. checkpoint looks like it's designed for something close (it's at least for media), but wouldn't do deduplication well (and I'm not convinced I'd be able to script it to do things like automatic transcoding and directory-structure syncing). So. Is there anything out there that can do all this, or should I consider it a programming project?

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  • Upgrade processes between FreeBSD/Ubuntu

    - by bianster
    Are there significant differences between FreeBSD and Ubuntu Linux when it comes to upgrading? FreeBSD appears to offers a more reliable path for upgrades with "freebsd-update" though I think "apt-get update --system" is the equivalent for Ubuntu. I'll like to know which one is less likely to produce SNAFUs when undertaking minor/major updates.

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  • Is there an eSATA memory stick / thumb drive?

    - by jasondavis
    The new PC I just finished building has eSATA support. I use a USB stick/thumb drive all the time on my PC for stuff, is there an equivalent available anywhere for eSATA? Please list one product per post, and provide a link to the manufacturer's product page. Also see the USB-3 version of this question.

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  • Read floppy from OpenVMS machine

    - by Goyuix
    I have a floppy I need to read the contents from - unfortunately it was formatted and the data written on an OpenVMS server. I believe the floppy is formatted "Files-11" and I can see parts of the MFT [equivalent] and file contents through a hex editor, however I would love to be able to mount this and actually read the files off. Is there a Files-11 FUSE module or other kernel module I can install to read this format? Any standalone utilities that can understand a floppy image taken with dd?

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  • should I put my multi-device btrfs filesystem on disk partitions or raw devices?

    - by Glyph
    If I'm going to create a multi-device btrfs filesystem. The official recommendation from the documentation apppears to be to create it on raw devices; i.e. /dev/sdb, /dev/sdc, etc, but this is not explained. Are there any advantages to creating a partition table on these devices first, either GPT or MBR, and then creating the filesystem on /dev/sdb1, /dev/sdc1 et cetera? Does feeding btrfs whole devices have some particular advantage, or are these basically equivalent?

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  • Why did Intel drop the Itanium?

    - by Cole Johnson
    I was reading up on the history of the computer and I came along the IA-64 (Itanium) processors. They sounded really interesting and I was confused as to why Intel would decide to drop them. The ability to choose explicitly what 2 instructions you wanted to run in that cycle is a great idea, especially when writing your program in assembly, for example, a faster bootloader. The hundreds of registers should be convincing for any assembly programmer. You could essentially store all the functions variables in the registers if it doesn't call any other ones. The ability to do instructions like this: (qp) xor r1 = r2, r3 ; r1 = r2 XOR r3 (qp) xor r1 = (imm8), r3 ; r1 = (imm8) XOR r3 versus having to do: ; eax = r1 ; ebx = r2 ; ecx = r3 mov eax, ebx ; first put r2 into r1 xor eax, ecx ; then set r1 equivalent to r2 XOR r3 or ; SAME mov eax, (imm32) ; first put (imm32) into r1 xor eax, ecx ; then set r1 equivalent to (imm32) XOR r3 I heard it was because of no backwards x86 comparability, but couldn't thy be fixed by just adding the Pentium circuitry to it and just add a processor flag that would switch it to Itanium mode (like switching to Protected or Long mode) All the great things about it would have surly put them a giant leap ahead of AMD. Any ideas? Sadly this means you will need a very advanced compiler to do this. Or even one per specific model of the CPU. (E.g. a newer version of the Itanium with an extra feature would require different compiler). When I was working on a WinForms (target only had .NET 2.0) project in Visual Studio 2010, I had a compile target of IA-64. That means that there is a .NET runtime that was able to be compiled for IA-64 and a .NET runtime means Windows. Plus, Hamilton's answer mentions Windows NT. Having a full blown OS like Windows NT means that there is a compiler capable of generating IA-64 machine code.

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  • X11 and Window Manager Confusion

    - by ell
    What roles do the Xorg server and a window manager, for example, metacity, play in displaying windows? Does the window manager communicate with the OS or Xorg? Does Xorg then use OpenGl to display things? Can someone explain what exactly the Xorg server does, and what exactly the window manager does, and the differences between the two. Also, if you could show me the Windows equivalent, that would be helpful. Thanks in advance, ell.

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  • Release/Renew IP Address via Terminal in OS X

    - by Rupert
    I am looking to release and renew my IP address in OS X 10.4 using Terminal. Essentially, I need the OS X equivalent of Windows: C:\ ipconfig /release C:\ ipconfig /renew However, I need the interface to remain active during this process, so using ifconfig down/up will not work. I believe I can clear the IP with ifconfig delete but I'm not sure how to get the dhcp client to reassign the address. An article from 2002 suggests using set dhcp but Apple's ifconfig man page does not include this information.

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  • Keyboard window snap-to-position on Linux

    - by Chris Dixon
    I'm looking for a Linux utility that allows me to define arbitrary keyboard shortcuts that will move the frontmost window to a specific absolute position on-screen, depending on the shortcut. An OSX utility which does this is Breeze (http://autumnapps.com/breeze/ ) -- Is there a Linux equivalent?

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  • OSX Server - How to set environment variable on network user login

    - by tmkly3
    I have a group of users on my server, "Developers", and I would like an environment variable to be set for them whenever they login. More specifically, when anyone in this group logs in, I would like the equivalent of: setenv ANDROID_SDK_HOME /Developers/Android/User to be set at login. I can do this with a login script if necessary, but what I'm asking is: is it possible to set this type of thing in Profile Manager, Workgroup Manager, Directory Utility, etc? Thanks - I've looked everywhere but can't find anything.

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