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• Configure Raid On Red Hat 5

  - by Sopolin

  Hi all, I have a problem with configure raid on red hat enterprise linux. The problem is when I create raid on two hard disks. It works successfully but after I remove one hard disk. It works normally. It means that I plug in one hard disk for testing configure raid. But after that I put both hard disks and create other file. The raid is cleared. My question is: Why do I turn off server machine, it clears raid that I configure first time before I turn off? Could anyone help to solve this problem? Thank, Ung Sopolin

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• Create new partition on ssd hard (remove hibernate)

  - by Aleks

  I bought Dell Vostro 3360 notebook with Windows 7 It has 128 GB SSD hard disk, it is already has 4 partitions: Dell partition, Recovery partition, OS partition, Hibernate partition. Here is screenshot (Russian language, but I made some marks): I want to split OS partition, because I need c:\ and d:\ . Reason is that I have a lot of difficulties with administration mode on c:. So I tried to split OS partition but I already have 4 partitions. Can I remove hibernate partition without consequences? I have Hibernate disabled in settings, but I have hiberfil.sys file on c:\ If I can remove it, how can I do this, I can't do this with standard GUI disk managment tool

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• How to upgrade OS on Mac Mini with external USB Drive?

  - by David

  We have a G4 Mac Mini, circa 2005, running Mac OS X 10.4 Tiger, and we want to upgrade to 10.5 Leopard. We have a Leopard install disk, but the optical drive in this mini is broken. So we transferred the install disk image to a USB HDD, but now we can't figure out how to boot off it. From what I've read in Mac forums, some PPC Macs, including some G4's, have been able to boot from USB, even though it sounds like this wasn't officially supported, and it may well depend on the specific model of USB drive and Mac. My Mac says CPU is "PowerPC G4 (1.2)" and Boot ROM is "4.8.9f4". I was hoping I might just find somebody here who had that same Mac Mini and find out if they could make it work. I'd especially like to know any specifics about the USB drive they found success with. Any insights at all would be appreciated. Thanks.

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• I get a consistency y error when I use my second hard drive

  - by Stavros

  I have two hard drives with win8 installed to both of them. Sometimes, when I boot from the second one (with F12 boot-menu and the second drive selection) and later reboot and start my PC from the first one, I get a disk error for a consistency problem. Windows ask for a disk check and after that, I can't anymore boot from the second drive or have access to it. Why this happens and how can I prevent it? What options do I have except from reinstalling windows? Thanks Stavros

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• Can't change current working directory to external drive in Windows

  - by Tom

  I'm trying to run a program located on an external USB disk using the Windows command prompt. I'm running Windows 7 64-bit (running in VMWare Workstation 8.0.) Here's what happens: I plug in the USB disk and it appears as drive letter 'E' in My Computer. I launch cmd from the start menu. I notice the prompt displays C:\Users\Tom> I type cd E:\ I notice the prompt displays C:\Users\Tom> (cd also yields C:\Users\Tom>) I can explore the drive using explorer.exe just fine, and it is connected according to VMWare Workstation. What am I doing wrong?

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• What are typical drive life times?

  - by Remus Rigo

  Can anyone tell me about the lifetime of drives (floppy, hard disk, CD, DVD, flash...)?

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• Install ubuntu with Win7

  - by 123Ex

  I'm using windows 7, Now I need to install Ubuntu 11.04 to the my lap top, I want keep win7 in my lap, I'm planing to keep dual boot system on my lap, I want to install Ubuntu on separate partition, I have deleted my windows empty partition to allocate the space to Ubuntu but when I'm proceeding with installation in Ubuntu, I couldn't recognize the empty partition, Ubuntu shows my full hard disk space one 50GB partition to install, I couldn't recognize the 50GB partition, can anyone tell me how to install Ubuntu on my lap. I really appreciate it, I want to install Ubuntu without loosing my existing data, to do that I have allocated empty unlocated disk space. Thank you in advance!

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• Nvidia 9 series or Intel HD 2000? [closed]

  - by EApubs

  I just tested an Nvidia 9300 GS card with a Intel Corei3 HD 2000 graphics system. Here is the windows experience index scores I got : Nvidia 9300 GS : Base Score 3.9 Processor : 7.1 Memory : 7.5 Graphics : 3.9 Gaming Graphics : 5.1 Hard Disk : 5.9 Intel HD 2000 : Base Score : 5.2 Processor : 7.1 Memory : 5.9 Graphics : 5.2 Gaming Graphics : 5.8 Hard Disk : 5.9 My questions are : When using Intel HD graphics, it reduces the score of my Ram! How is that possible? It checks the speed of the ram. Not the size (i think). Intel graphics take some of the ram space but how can that effect the speed? From both of them, what will be the good choice?

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• How to have a soft-real-time process in presense of heavily swapping IO-intensive background load?

  - by Vi

  schedtool: PID 32301: PRIO 4, POLICY R: SCHED_RR , NICE -20, AFFINITY 0xf ionice: realtime: prio 4 But the music is stumbling anyway. Background load is low prio (SCHED_IDLEPRIO, idle ionice), but uses a lot of memory (more than is physically available) and does a lot of IO and calculations. Latencytop shows about 1500ms for: Following symlink Writing buffer to disk (sync) Page fault Writing a page to disk both for the bg load and for unrelated processes. Load average is 10 and counting. Why cannot it allocate, for example, 200MHZ of one of the cores and 32M of memory and not less than once per second opportunity for IO for mplayer to make it happy while continuing calculations on the background? Or: why it cannot leave background task and swap loving each other but keeping the rest of the system as if there were no background load? How to have RT processes AND heavy bg load simultaneously (without of virtual machines)?

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• Get error (Repair Filesystem) 1 # when I install 4 new Hard drives in RedHat Linux 5 on a Dell PowerEdge 2900

  - by Alos Diallo

  Hi I am using a Dell PowerEdge 2900 running RedHat 5. I had 4 drives in the system using a Raid 5, I purchased and installed 4 more drives keeping the configuration the same. Set up the Vertual disks in PERC 6/i. When I exit out and reboot the system I get the following: fsck.ext3: No such file or dirrectory while trying open /dev/ddb1 [FAILED] ***An error occurred during the file system check. ***Dropping you to a shell; the system will reboot ***when you leave the shell. Then am prompted for the root pw. I enter it and am then prompted with: (Repair filesystem) 1# if I type fdisk -l I get some info on the disk along with: Disk /dev/sdb doesn't contain a valid partition table I am then prompted for (Repair filesystem) 2# If I reboot I am taken to the same screen again. The system was working before this happened. Does anyone know why this is happening and or what I can do to fix it? Thanks

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• ata error: UnrecovData Handshk

  - by Aaron Digulla

  I just saw this message in my log (openSUSE 11.3, Linux 2.6.36.2): ata6.00: exception Emask 0x10 SAct 0x1 SErr 0x400100 action 0x6 frozen ata6.00: irq_stat 0x08000000, interface fatal error ata6: SError: { UnrecovData Handshk } ata6.00: failed command: WRITE FPDMA QUEUED ata6.00: cmd 61/58:00:9f:69:00/00:00:00:00:00/40 tag 0 ncq 45056 out res 40/00:04:9f:69:00/00:00:00:00:00/40 Emask 0x10 (ATA bus error) ata6.00: status: { DRDY } ata6: hard resetting link ata6: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata6.00: configured for UDMA/133 ata6: EH complete Two questions: Which disk caused the error? I search /sys and /proc but couldn't find a way to map ata6 to a device (/dev/sdaXY) When such an error happens, does Linux retry the disk operation? Or do I have a corrupt filesystem?

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• LVM mirroring VS RAID1

  - by syrenity

  Hi. Having learned a bit about LVM mirroring, I thought about replacing the current RAID-1 scheme I'm using to gain some flexibility. Problem is that according to what I found on the Internet, LVM is: 1) Slower then RAID-1, at least in reading (as only single volume being used for reading). 2) Non-reliable on power interrupts, and requires disk cache disabling for prevention of data loss. http://www.joshbryan.com/blog/2008/01/02/lvm2-mirrors-vs-md-raid-1/ Also it seems, at least to several setup guides I read (http://www.tcpdump.com/kb/os/linux/lvm-mirroring/intro.html), that one actually requires a 3rd disk for storing the LVM log. This makes the setup completely unusable on 2 disks installations, and lowers the amount of used mirror disks on higher amount of disks. Can anyone comment the above facts, and let me know his experience of using LVM mirroring? Thanks.

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• Time machine link error

  - by robinjam

  When attempting to perform a Time Machine backup, the backup appears to proceed as normal, until it finishes copying files at which point it complains that an "error occurred while linking files for" one of my external hard disks. During the previous backup that particular disk was in fact empty, and therefore I can't understand why Time Machine is attempting to link back to it. But alas. I've verified all my disks using Disk Utility and they all appear to be fine. Does anybody know what causes this error, and how I might go about fixing it? Failing that is there a way to force Time Machine to create a brand new backup rather than an incremental one? Thanks in advance!

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• Portable and Secure Document Repository

  - by Sivakanesh

  I'm trying to find a document manager/repository (WinXP) that can be used from a USB disk. I would like a tool that will allow you to add all documents into a single repository (or a secure file system). Ideally you would login to this portable application to add or retrieve a document and document shouldn't be accessible outside of the application. I have found an application called Benubird Pro (app is portable) that allows you to add files to a single repository, but downsides are that it is not secure and the repository is always stored on the PC and not on the USB disk. Are you able to recommend any other applications? Thanks

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• Developing and implementing a testing plan for a software app deployed on a web server

  - by Abhzoo

  A company in the USA is building a new Web App that will be offered SaaS to customers and the development is being done by a software development team located in a different country(India). They are about to take delivery of a first demo to provide live feedback to the team in India. The overseas team requires a cloud server (Windows + SQL Standard, 8GB Ram, 8 vCPUs, 40GB SSD system disk, 80GB SSD data disk, 1600Mb/s network bandwidth) to serve as a tester server. When the tester is setup the team will install the app on the test server to get live feedback. Q:Explain in detail how you will develop and implement a testing plan for the software App. Be sure to explain the specifics. PLEASE HELP, NEED ANSWER ASAP

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• How can I set deadline as the I/O scheduler for USB Flash devices by using udev rules?

  - by ????

  I have set CFQ as the default I/O scheduler. I often get bad performance when I write data into a Flash device. This is resolved if I use deadline as the I/O scheduler for USB Flash devices. I can't always change the scheduler manually, right? I think writing udev rules is a good idea. Can someone please write rules for me? I want: When I plug in a USB device, detect the type of the device. If it is a portable USB hard disk, do nothing (I think if a device has more than one partitions, it always a portable hard disk. If it is a USB Flash device, set deadline as it's scheduler.

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• monitoring load on AWS EC2

  - by hortitude

  I'm interesting in monitoring our EC2 instances to ensure we scale up when necessary. Right now we are monitoring idle CPU time as our metric. We aren't measuring disk IO as we are not a very disk intensive application. When running on our own hardware in a datacenter I also usually monitor "load" from the top command. My question is: Does it make sense to monitor "load" on a shared env such as EC2? If so, how do you interpret the results?

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• Offline installer for .net 3.5 sp1 not working

  - by Tim Tom

  I download a big file of .Net 3.5 SP1 from http://download.microsoft.com/download/2/0/e/20e90413-712f-438c-988e-fdaa79a8ac3d/dotnetfx35.exe Now when I try to install it on Windows Server 2012, I get the following screenshot: What the?? When will the microsoft learn? Now this is a loop. When I try to install from Server Manager, I get installation cannot be done. It needs installation disk. Does that mean I can't install at all without the installation disk in presence?

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• How to troubleshoot if a zip file is valid or if it is big file size to be unzipped ?

  - by mireille raad

  Hello , I am trying to unzip a file with the size of 2GB I am getting the following error : unzip CLTE_C_08.zip Archive: CLTE_C_08.zip End-of-central-directory signature not found. Either this file is not a zipfile, or it constitutes one disk of a multi-part archive. In the latter case the central directory and zipfile comment will be found on the last disk(s) of this archive. unzip: cannot find zipfile directory in one of CLTE_C_08.zip or CLTE_C_08.zip.zip, and cannot find CLTE_C_08.zip.ZIP, period. After some googling, some people say that this error is because the file is too big, others say because file is corrupt, others say that it could be a not unix archive. So my question , how to find out if file is valid archive file on my Centos and what is the command/trick to uncompress big files ( if any ) Thanks in advance :)

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• System failure - need diagnostic recommendation

  - by Ladislav Mrnka

  I have big problem with my computer. Configuration is: Intel i7 + 6x2GB OCZ DDR3 Motheboard: Asus P6T Deluxe V2, HDD controller configured to AHCI Main drive: OCZ Vertex 2 (SSD) - contains all installed programs and system Second drive: Samsung SpinPoint - contains User profiles, ProgramData, virtual machines and databases Third drive: Samsung SpinPoint - data drive + backups OS: Windows 7 Ultimate x64 I have never had any problem with this computer until now. During weekend my computer completely crashed without any reason. Each time I tried to boot to Windows I got BSOD with message BAD_SYSTEM_CONFIG_INFO and automatic restart (I didn't install any new SW or HW). But after restart main OCZ drive was disconnected (not detected by BIOS). When I turned off and on computer, the drive was again connected. It also happend every single time I tried to repair installation somehow. It ended with some error and after restart drive was disconnected. The only thing which worked was format + fresh install. After installing almost everything I wanted to install Visual Studio 2010 Ultimate (complete installation without SQL Server Express). During installation of VS itself I always get BSOD - it is too fast so I'm not able to read description. After restart it searches for all disk drives for really long time and sometimes it changes boot drive so the system is not able to start - Bootmgr not found. After reconfiguring BIOS the system starts. There is no event describing the failure in Event viewer. Installing VS 2010 is absolutely necessary for me. I need help with diagnostic. I need to find where is the problem - I expect that the problem is in OCZ drive or in HDD controller on motherboard but I don't know how to find it. All components still have valid warranty. Can you recommend me some approach or tools to find the problem? Edit: I'm still looking for source of the problem. New information is that Windows are not able to perform check disk (Chkdsk) on the SSD system drive. After restarting it always starts checking drive and in part where files are checked it fails with BSOD - BAD_SYSTEM_CONFIG_INFO. After next restart and skipping check disk tests the system runs.

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• What are typical drive lifetimes?

  - by Remus Rigo

  Can anyone tell me about the lifetime of drives (floppy, hard disk, CD, DVD, flash...)?

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• Xen 4.1 host (dom0) with blktap disks ("tap:aio:") not connecting

  - by Manwe

  Problem using blktap with xen-4.1 running Ubuntu Precise stock kernel with dom0 xen-4.1. I get: [ 5.580106] XENBUS: Waiting for devices to initialise: 295s...290s. ... [ 300.580288] XENBUS: Timeout connecting to device: device/vbd/51713 (local state 3, remote state 1) And some syslog lines: May 17 13:07:30 localhost logger: /etc/xen/scripts/blktap: add XENBUS_PATH=backend/tap/10/51713 May 17 13:07:31 localhost logger: /etc/xen/scripts/blktap: Writing backend/tap/10/51713/hotplug-status connected to xenstore. with tap:aio: disk lines. file:/ works. disk = [ 'tap:aio:/data/root.img,xvda1,w', ] Problem exists with lucid and precises domU kernels and both guests work in Ubuntu hardy dom0 Host 64bit 2.6.24-28-xen xen-3.3 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Distributor ID: Ubuntu Description: Ubuntu 12.04 LTS Release: 12.04 Codename: precise

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• Any experience with SATA SAS Interposer Cards?

  - by korkman

  Driven by the current price difference between SATA and SAS disks on one side and the potentially bad behaviour of SATA disks in bigger storage arrays on the other side, I have found so-called SATA-to-SAS interposer cards. Advertised as "seamlessly adding SAS capabilities to existing SATA disk drives", I wonder if anyone here has had some experience with these or similar products. The major benefits I can identify are the increased cable voltage (if all drives are SAS connected), the ability to power-cycle the drive and multipath (if desired). Obviously the SATA drive will still have to be RAID edition. The question is: Do these cards indeed increase the overall reliability of a storage system, or will failing SATA disks cause trouble nevertheless? Edit: I'm not asking for hypothetical answers, only actual experience please. I'm well aware that the typical 10k SAS drive is more reliable (and better performing) than 7200 SATA drives. But how does a nearline SAS, which is phyiscally the same disk as its SATA counterpart, compare to the SATA version with interposer?

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• Intuitive view of what's using the hard drive so much on Windows 7?

  - by Aren Cambre

  Sometimes my hard drive usage is near 100%, and I have no idea what is causing it. Are there any utilities that can help diagnose excessive hard drive usage and have as intuitive of an interface as Task Manager's Processes tab, which I can sort by CPU usage? I am aware of using procmon, of adding columns to Task Manager's Processes tab like I/O Read Bytes and I/O Write Bytes, and using Resource Monitor's Disk tab. Too often, these don't give me useful information or clearly identify a single process that is hogging the disk.

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• harddrive problem (usb external)

  - by masfenix

  Hey guys I am using a Maxtor One Touch 3 given to my by my uncle. It is connected through USB2.0 When I plug it in, XP installs it and says "the device is ready to use". But it dosnt show up on my computer. It dosn't even show up in disk mangement. I then install Acronis Disk Director (which detects it) but marks it as offline. if i try to change it to online, nothing happens. (actually the lights on the HD blink - meaning communication and goes back into offline mode). The lights on the HD return to a solid which mean "working properly". Here is a screenshot: Is there any way to extract the data off the drive? is the drive corrupt? sitll useable? edit: DISKPART screenshot: edit2: I ran Seagate diagnostic tool and this came up: Long Generic - Started 9/10/2010 6:44:36 PM Bad LBA: 0 Unable to repair Long Generic - FAIL 9/10/2010 6:46:41 PM SeaTools Test Code: 4

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