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  • How to stop a Linux LVM volume group?

    - by thkala
    I am currently dealing with a multiple disk failure on a Linux LVM Volume Group that is backed up by a RAID-5 md device. One disk has been taken out completely and another one is showing a limited number of corrupt sectors, due to what seems to have been a misbehaving power supply. The problem is that once an I/O error hits, md takes the array down, since it does not have enough devices for it to be operational. Where md the only one involved, I could mdadm --stop the array and then recreate it to get all devices active again. Unfortunately, the array is a PV in an LVM volume group and I cannot seem to get the kernel to release it. vgchange -an does not seem to do anything, bar spew out a couple of I/O errors. I am obviously missing something, but how in the name of -insert-favorite-deity- do I get LVM to release the underlying PV without rebooting the server?

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  • Windows XP waits for usb drive on almost every operation.

    - by Tomasz Kowalczyk
    Hello everyone, I have a problem with my Windows XP operating system, particularly with the USB device that is plugged in - 1TB WD My Book external drive. I haven't found any information about such behaviour when searching in Internet, so I have to ask You. The problem is: when I am using computer, especially during work (programming), when I try to access any information on a hard disk ("internal" one), Windows seems to "consult" it with the external drive. For example, when I open file selection dialog window, if I try to change directory, system activates external drive, reads something (I hear the disk's operational noise) and after some seconds of such pause it makes the operations I requested. There are many situations in which I can reproduce this behavior - opening My Computer, shutting down system, opening partition folder from My Computer - every operation involves the usage of external drive. Please understand me properly - this is not something that happens EVERY time, but at least "many" times a day. What causes such behavior and how can I "turn off" external drive when it's not needed? Thanks in advance for your answers.

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  • MacBook: Can't boot into Linux partition after installation.

    - by Otto
    Hello I just installed Ubuntu. I created a partition in MacOSx using Disk utility, then deleted the partition and installed Ubuntu on the free space created. After the installation, Ubuntu said it would reboot. I hang on shutdown (which is normal, as google told me), so I used the power button to turn the MacBook off. Now I want to boot into Ubuntu. Pressing option/alt on startup only shows me the MacOSx and Windows partition. Also, the Linux partition isn't showing up on my MacOSx desktop. And in Disk Utility, I can see 3 grayed out partitions: "disk0s4", "disk0s5" and "Linux Swap". What can I do to boot into Ubuntu without losing my other partitions? Thank you for your help.

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  • What type of malware can reside in windows restore?

    - by qwertymk
    I was reading aking1012's comment on How to create Windows Vista/Windows 7 Startup disk or Rescue disk or system restore points on a CD? . He says that: The first thing I usually do is disable system restore. Some REALLY nasty malware hides in there and is very difficult to delete. As far as rescue media, I make a full backup image. It doesn't directly address the question so it's a comment not an answer, but I thought it was worth noting What type of malware can hide there, and how is that possible as the restore info must be stored with a checksome to make sure it's not modified, right?

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  • RAID across SAS controller ports

    - by BlueGene
    Hi, I'm managing a HP DL360 G5 machine. It has a SAS controller with two ports. Port 1 is attached to 4 drive bays and Port 2 has 2 bays. The machine currently has 3 drives connected to Port 1 with RAID 5 configuration. I'm trying to max out the bays by adding 1 disk in port 1 and 2 in port 2. Can I group those three disks(1 disk-port, 2 disks-port 2) in a RAID 5 configuration?

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  • "EISA Configuration" partition

    - by jpbochi
    I have a new Alienware M17x running Vista x64. I just found out that it came with a misterious "EISA Configuration" partition. On Disk Management, my Disk 0 tells me that my HD has about 300 GB. The EISA partition has 12 GB. That's big enough to know why is it there. So, this is more of a bundle question. What is this "EISA Configuration" partition? Is it safe to remove it somehow? If so, how can I delete it? I mean join it with the primary partition, or set it as a secondary small partition.

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  • EC2 persistence of machine

    - by Seagull
    I notice that EBS-backed AMIs are much like a VMWare instances -- I can stop them and also persist them to disk, and all this is done relatively quickly. However, I believe that S3 backed machines are different. They cannot be 'stopped', but rather can only be shut-down, written to S3 disk and started up again; with at least a 15 min delay in doing so. Why the difference? How do AMI providers decide whether to use EBS or S3? If I need to stop/persist/restart machines relatively frequently, then I am implicitly limited to just the EBS-backed machines?

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  • Which are the most important directories to backup on a Linux server?

    - by QAH
    Hello everyone! I'm running an Ubuntu 9.10 Linux server. I'm trying to find a way to backup the machine while it is running and from what I see, this eliminates the disk clone utilities. All of the disk clone stuff I have seen for Linux requires that you reboot into a special live CD. So my question is this, what is the best solution for backing up the system while it is running? Also, I don't really care about the OS config too much, I just want to be able to keep my stored files and my programs that I have installed on it. Thanks

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  • Directly paste clipboard image into gmail message

    - by Frank Meulenaar
    I would like to be able to directly paste my clipboard image into a Gmail message. I could then just do alt-print screen, go to Gmail compose and press ctrl-v to embed a screenshot, for instance. I'm not talking about embedding a image from disk into my email; that's easily done. I want to skip the step where I have to save it to disk first. Eudora/Thunderbird support this. There's a program that does this, it's at picturepaste.com, but it's paid (and and the website uses Javascript for no obvious reasons). You can see the demo movie there if it's not clear what I would like. I would like to find a free alternative, or make one myself, but I have no clue how picturepaste works.

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  • What are the quality metrics for RAM?

    - by Hi-Tech KitKat Android
    I have searched RAM and i found there are given some specification for the same capacity RAM, What are the difference and performance comparison between these? Like RAM1 General Brand Transcend Memory Type 2 GB (8 x 128 MB) DDR2 DIMM Memory Standard DDR2-800/PC-6400 Compatible Device PC Pins 240-pin Burst Length 4, 8 Buffered/Unbuffered Unbuffered Memory Memory Clock 400 MHz Technology DDR2 SDRAM Memory CAS Latency 4, 5, 6 RAM 2 General Brand Transcend Memory Type 2 GB (8 x 128 MB) DDR2 DIMM Memory Standard DDR2-667/PC2-5300 Compatible Device PC Pins 240-pin Burst Length 4, 8 Buffered/Unbuffered Unbuffered Memory Memory Clock 333 MHz Technology DDR2 SDRAM Memory CAS Latency 3, 4, 5 RAM3 General Brand Kingston Memory Type 2 GB (64 x 256 MB) 800 MHz DDR2 DIMM Compatible Device PC Pins 240-pin Error Check Non-ECC Buffered/Unbuffered Unbuffered Memory Memory Clock 200 MHz Technology DDR2 SDRAM Memory CAS Latency 6 What are the affect of the following Memory Type(given as 8 x 128 MB) Memory Clock (given in MHz) CAS Latency (given as 4,5,6) my Requirement is 2 GB DDR2 Type Desktop Please help

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  • cannot access new drive through nfs

    - by l.thee.a
    I am running nfs-kernel-server to access my files on my linux machine(ubuntu - /share). The disk I have been using is full. So I have added a new disk and mounted it to /share/data. My other pc mounts the /share folder to /mnt/nfs; but cannot see the contents of /mnt/nfs/data. I have tried adding /share/data to /etc/exports, but it did not help. What do I do? PS: I am looking for another solution than explicitly mounting /share/data on the second drive.

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  • What are the mandatory Linux kernel modules to run inside of ESXi

    - by Marcin
    I'm used to rolling my own kernels for servers, as it nicely minimizes the number of exploits (and the resulting patches) to take care of. In a traditional (bare metal) world, the whole process is about knowing what you have (hardware), and what you need (Ethernet, IPv4, iptables, etc.) In a virtualized environment, some things stay the same (still need Ethernet and IPv4), some things go away (power management), and then there are some new needs (vxnet3, or vmware-tools, even though that's compiled outside of the kernel). So my question mostly concerns itself with the last two categories: what can I remove completely, and what new stuff do I want? For example, what IO scheduler do I want, if all my disk operations are going through another filesystem/scheduler/cache to get to the virtual disk? Do I need hyper-threading enabled, or is the VM going to show them to me anyway as a CPU anyway? Do I need Large Receive Offload turned on, or is that something that the hypervisor's network drivers are going to do for me?

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  • P2V using Acronis True Image Home 10 and Windows 7

    - by Anthony
    I have a full system image using Acronis True Image Home 10 and want to run it as a virtual machine on Windows 7 Professional. I have created a virtual machine but Windows Virtual PC doesn't allow access to a USB external hard disk when booting from the Acronis Recovery CD. I've copied the backup onto the host machine and I can access it via the network using the Acronis boot CD but I'm wondering if there is an easier way? Does any other free Virtual Machine software support USB devices during boot (i.e. I can restore a backup image from the USB hard disk directly)

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  • CHKDSK always runs on Hyper-V image

    - by Dave
    I am having a problem with one of my VM's. Every time it boots, CHKDSK runs and finds no errors, but it goes into an endless loop (CHKDSK/Reboot/CHKDSK). The only way I can get Windows to boot is by cancelling the chkdsk. Is there any way I can tell windows to not do it? What do you guys suggest? Can't redo server. I guess it's also fair to say I get the following errors in Event Viewer "The file system structure on the disk is corrupt and unusable. Please run the chkdsk utility on the volume \Device\HarddiskVolume2" "The file system structure on the disk is corrupt and unusable. Please run the chkdsk utility on the volume C:\" I only have 1 VHD attached, not sure what Volume 2 is. Thanks!

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  • WIndows 7 cannot boot - bootrec reports FS not found or corrupt

    - by purecharger
    For 3 days now I've been unable to boot into my Windows 7 partition, and all my research has been to no avail. I'm hoping someone here has more ideas on how to fix this. When I boot up now, I get the black screen with BCD error that says theres no valid file system or it may be corrupt (pardon my lack of detail, no copy/paste is available then). When I boot with the Windows 7 disc and go into repair tools, no operating system is found, and attempting to automatically repair the problem fails with Unknown Operating System (Unknown Disk) or something similar. When I drop into the command prompt, I am able to see and navigate my C:\ drive without issue. I attempt to use bootrec: C:\> bootrec /ScanOS Finds C:\Windows as a system partition. C:\> bootrec /RebuildBCD Fails with volume does not contain a recognized file system. please make sure that all required file system drivers are loaded and that the volume is not corrupted. So then I attempt to fix the bootsector: C:\> bootsect /nt60 C: /force Which completes successfully (sorry, no output..) Upon rebooting, I have the same problem. I've also tried all of the above after making my Windows partition active: C:\> diskpart DISKPART> select disk 1 DISKPART> select partition 1 DISKPART> active DISKPART> exit Then bootrec as above, both with and without a reboot after the DISKPART commands. Then I've also tried rebuilding the BCD store by hand: set systemdrive=C: set tempbcd=C:\boot\bcd.temp set tempfile=C:\boot\temp.txt bcdedit -createstore %tempbcd% bcdedit.exe -store %tempbcd% -create {bootmgr} -d "Windows Boot Manager" bcdedit -store %tempbcd% -create -d "Windows Vista" -application osloader>%tempfile% set /p winvistaguid= <%tempfile% set winvistaguid=%winvistaguid:~10,38% bcdedit -store %tempbcd% -set %winvistaguid% osdevice partition=%systemdrive% bcdedit -store %tempbcd% -set %winvistaguid% device partition=%systemdrive% bcdedit -store %tempbcd% -set %winvistaguid% path \Windows\system32\winload.exe bcdedit -store %tempbcd% -set %winvistaguid% systemroot \Windows bcdedit -import %tempbcd% However on the import, I get my familiar friendly message: volume does not contain a recognized file system. please make sure that all required file system drivers are loaded and that the volume is not corrupted I'm at my wits end here, and I cannot understand why Windows refuses to see this as a valid install. When I list the disk/partition in DISKPART, it shows up as NTFS and "Healthy", and I can navigate the directory structure from DOS with no problems. I really, really do not want to reformat and reinstall. I know this problem can be solved!

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  • Unable to burn Windows ISO from Fedora

    - by user331947
    First of all, English is not my native tongue, so apologies for any mistakes. My computer recently started prompting that it can't launch Windows successfully. So I just choose start Windows normally. Then, I found that the startup freezes at the Windows screen (before the login prompt). I have tried rebooting several times and get the same results. So I just gave up. After few days, I tried to boot up my laptop again. This time it got to the desktop, but it's extremely slow and the icons on my Desktop don't show up. I decided to format the Windows partition and reinstall a new one. (It is usually faster that way since I kept my 400GB+ data on aother partition and programs and the rest in the same partition as Windows). The thing is I get the Windows disc at the moment (Traveling aboard). But I have a Windows 7 disc image on my hard disk. So, I downloaded Ubuntu 14.04 LTS, made a Live USB, and then try to burn the image from Ubuntu. But the program just freezes and I don't know why. I tried several times and it's still the same. So I tried using Fedora instead, just to see if it will work. The Disk Image Writer report something like this. Error unmounting /dev/dm-0: Command-line `umount "/dev/dm-0"' exited with non-zero exit status 32: umount: /: target is busy (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1).) (udisks-error-quark, 14) Also, I tried installing linux on the windows partition. The installation program freezes (both Ubuntu and Fedora). So, I thought that maybe something are wrong with my hard disk. I seek the solution on the internet and found that gparted can be used to format a partition. And it also froze at "Searching /dev/sda/ partition ...". I'm using Lenovo Y570. Spec below. http://www.notebookreview.com/notebookreview/lenovo-ideapad-y570-review-a-lenovo-bestseller/3/ Can anyone suggest a next step in diagnosing and fixing this problem? Thanks in advance.

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  • Which is faster for read access on EC2; local drive or EBS?

    - by Phillip Oldham
    Which is faster for read access on an EC2 instance; the "local" drive or an attached EBS volume? I have some data that needs to be persisted so have placed this on an EBS volume. I'm using OpenSolaris, so this volume has been attached as a ZFS pool. However, I have a large chunk of EC2 disk space that's going to go unused, so I'm considering re-purposing this as a ZFS cache volume but I don't want to do this if the disk access is going to be slower than that of the EBS volume as it would potentially have a detrimental effect.

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  • what damage can be caused if scandisk is not run before defrag

    - by Justin Gregoire
    Hello, I would like to know what the damage to a drive can be if a scandisk is not performed before a disk defrag. I have looked up some sites that say a scandisk should be run to correct any issues that may be apparent on the system, making sure that the drive is free of errors before a disk defrag is done. I have to perform a defrag on a computer without having physical access to it (using remote connection). I know that the scandisk requires a reboot to the system (causing me to lose my connection) which would be difficult to restart physically if the system does not come back on by itself once rebooted (this has happened before). Any suggestions? Thank you.

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  • Do 10m external SAS cables work?

    - by Joachim Sauer
    According to the Wikipedia page external SAS cables are specified for up to 10m length. However, I found it pretty hard to actually find places that sell cables of that length. This made me wonder: Are there any known problems with using cables that are as long as this? Will it be more fragile? Slower? And if 10m is not suggested, would 6m be any more stable? A little background: for several reasons we'd like to put a tape library physically separate from our main server and 10m would be enough to put it on a separate floor.

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  • How should I convert a physical drive to a VHD for use with VirtualPC?

    - by RBerteig
    I have the hard disks from a PC that was happily running Windows Me until is it suffered an unknown hardware failure. The drives are intact, and can be mounted and read on other PCs. We have data backups, but there is licensed software installed that may not be possible to migrate to newer versions running on a more modern platform making the idea of just booting a virtual image attractive. Is it possible to make VHDs from the drives such that I can boot them in VirtualPC? If not VirtualPC, would it be possible in any other virtualization tool? Edit: Some more details.... The system was running Windows Me, but upgraded from Windows 95 (or possibly 98). It can't have been more than a Pentium II, but I will have to look at the motherboard to confirm that. There were no "exotic" devices installed, and nothing beyond the usual legacy stuff that would need to survive into a virtual machine. The licensed software did not have a dongle, so I won't need to worry about virtualizing a physical dongle of some kind. Licenses were probably died to the disk serial number. There were two HDs, both IDE. The boot disk is about 6GB, and the spare data disk is 12GB, but nearly empty. I have a small bias in favor of VirtualPC just because its free and I've used it successfully in the past. But this is a good excuse to revisit the state of the art. I do know from direct experience that it is possible to install and boot DOS 5.0 and Win95 in VirtualPC, but the VM extensions weren't available so the experience isn't as seamless as I would have liked. A very old DirectX game that failed miserably under XP SP2 runs really nicely on that VM, and actually plays better in a lot of ways than it did on period hardware, so that gives me hope that this is possible. Edit 2: Well, I'm closer than I was when I asked... so thanks to all for helpful suggestions and hints to what I should be trying. I used WinImage to copy the disks, and VirtualPC 2007 to attempt to boot. So far, I have it booting in safe mode, but hanging with a black screen otherwise. I strongly suspect that the copy of Artisoft Lantastic 8.0 (anyone else remember them?) that is still installed for networking with even older PCs that mostly don't exist any more is the culprit there. In my infinite free time, I will try to resolve the differences between a Safe Mode boot and a normal boot, and feel that it is likely to yield to pressure. I'd accept more than one answer if I could... this isn't as black and white a question as the one accepted answer convention assumes.

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  • Partitioning a bootable Flash drive

    - by mmc
    Is it possible to have a 2 partition Flash drive that looks like the following: A partition that is bootable to OS X (this will require a GUID partition table) A second partition formatted either FAT32 or NTFS that is readable on both OS X and various flavors of Windows I have set up a disk using Disk Utility on the Mac, and it boots fine with a second FAT32 partition... but Windows does not see it. Any flavor of Windows wants to format the entire drive. Has anyone done this, and if so, can you explain the steps you followed? EDIT: Making it bootable is no problem. I have that. I'm wondering how to make the second partition on a Flash drive visible to Windows. It's possible that the "second partition" is the problem, and I need Windows to be first, and HFS to be second. I'll try that tonight.

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  • NTFS Error - file system structure is corrupt and unusable

    - by SomeGuy
    My Windows 7 (64) keeps completely locking up, and I have to hold the power button to shit it down. Event logs are showing EventID 55. I realize that this can be a warning sign of an impending disk failure, but my data on this machine is safely backed up and I don't feel like taking the time to replace the drive right now. When I have seen this problem before, I have been able to delete the offending folder with a Linux Live CD. (When CHKDSK /F didn't work). In this case, the folder is from VSS. I assume this is from Crashplan, my online backup provider. What are the ramifications of deleting this folder from Linux? Is it safe to do? "The file system structure on the disk is corrupt and unusable. Please run the chkdsk utility on the volume \Device\HarddiskVolumeShadowCopy26."

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  • Is there a command line (or autohotkey) way of dismounting a USB drive?

    - by justintime
    I find dismounting a USB drive takes far too many mouse clicks for my liking. Is there are command line way of doing it (XP and Vista)? Addition I have an eye condition that makes hand mouse coordination difficult so any suggestion that there aren't too many clicks will be downvoted as not answering my question. However I use AutoHotkey a lot and one use case would be to call it from an AHK script. So if there is a way to code it in AHK that will do. Added this to the tags. Further question - is it safe to remove a disk when the computer is a. on Standby or b. Hibernated. I recall that W2000 got uspet if you pulled a disk from a hibernated machine. Or is it better to explicitly dismount or sync before you hibernate or standby - prabably in a script.

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