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• Grub Rescue Error: Unknown Filesystem

  - by James

  I was trying to dual boot Windows with Linux (linux installed first). I read that it was easier to do so if windows was installed first. So I tried to install windows, by creating a partition for it. There wasn't enough room on the drive so I tried changing the filesystem of my existing partition to support windows. Now whenever I try to start my computer I get the grub rescue screen. I've tried booting from CD and USB with ubuntu and also with windows, but nothing happens. I ran ls in grub rescue and got hd0, (hd0,msdos5), cd (with an install disc inserted), fd0, and fd1. However if I run ls on any of these I receive the error: unknown filesystem. Can anyone help me out?

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• Grub can't find device on boot resulting in Grub Rescue

  - by user1160163

  So I have 2 hard drives a HDD 320GB and a SSD 20GB. Before I had Windows 7 on the HDD and Ubuntu on the SSD but wanted to get rid of windows and reinstall a clean Ubuntu on the SSD then use the HDD for storage. So I deleted everything from the HDD and set up the SSD with 18GB ext4 and 2GB Swap and installed Ubuntu on the 18GB ext4. Though now when I boot up I get "Error: No such device Grub Rescue" I have a live USB and I ran the Boot Repair following these instructions - grub rescue after install of Ubuntu 12.04 (dual boot) - it says successful though still have the same problem. This is the given URL from Boot Repair - http://paste.ubuntu.com/1257988/ Thanks for any help given.

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• Grub rescue doesn't allow me to boot from LIVE CD/USB

  - by Thameem

  I used to have Windows Vista & Ubuntu 12.04 on dual boot. Accidentally, I deleted the Linux partition and landed on Grub rescue on the next boot. The tricky thing for me here is I have been trying to boot through LIVE CD/USB of the ubunutu version, other linux versions but in vain. What happens is, it appears as if it reads the CD/DVD drive or the USB flashes for a while when trying to boot through LIVE versions but the Grub rescue appears after a while. The only option I could think here is to remove the hard disk and connect to the other laptop I have through USB and reinstall a fresh OS. Please suggest me a way to boot through the DVD/USB again. My laptop is Sony VAIO CR32 series.Thanks.

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• Stuck With grub rescue> console

  - by rej santos

  Here is the background of my issue: I just recently installed the latest version of Ubuntu along side with Windows 8 Enterprise. However upon checking the disk size, it seems that some of the portions of the hd memory were gone so I decided to check the disk partition and have seen that is was being used by another file system. Thinking that the Ubuntu takes it boots stuff from my drive C: , I deleted that partition and formated so I can use it to store some movies, music etc. Now, as I switch on my machine, I am stucked with: error: unknown filesystem grub rescue> I googled a lot and saw the following command which seems no to me like sudo, chainloader etc, all of these command only returns unknown command in the console. What I just wanted is to boot from my Windows 8 OS. Just to add, I can't open the BIOS menu so I could choose what media to boot. As I open my machine it automatically takes me to grub rescue console. Here are the thing I already have: Ubuntu Installation Disk Windows 8 System repair Disk I just don't know how to boot into these things. Let me know what to do.

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• Repairing hard disk when Windows installation disk won't boot

  - by Echows

  I'm trying to recover some data from a faulty hard disk with Windows installed on it (on which Windows won't even boot). I have tried so far: Booting to Ubuntu live USB stick and running ntfsfix (didn't work) Trying to mount the broken partition when running Ubuntu from usb stick (doesn't mount) Running photorec image recovery tool from live Ubuntu (it found some stuff but not the images I was looking for) Now as a last resort I got myself a Windows installation on a USB stick so that I can try fdisk, but the installer doesn't work. The loading screen shows up and then the installer crashes. The installer works fine on other computers. I suspect that the installer is trying to read the hard drive to see if there's something there but when it can't read one partition, it crashes. On Ubuntu, I can mount other partitions except the one I'm interested in so at least the hard drive is not completely dead. So the question is, what options do I have left? To be more specific, my goal is to recover some images from the faulty ntfs-partition on the hard drive. Other than that, I don't care about the contents of the hard disk.

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• grub rescue: grub not installed

  - by linda8

  I tried to install beside my windows 7. It didn't work. After installing it could not find the root directory and I got some other error messages... I just wanted my computer to be faster again so instead I decided to reinstall windows from recovery disk. It formatted the disk and installed windows again. The hard-disk has msdos structure now and the ubuntu partition is empty When I start up the computer grab is starting up an I get a grab rescue problem, but grab is no longer installed. How can I boot directly into windows? i can boot Ubuntu from an usb stick but I'm not able to install it anymore. I just want windows to work again... I'm hoping for advice... Linda

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• Server 2008 Disk Management Hangs

  - by Payson Welch

  So I have looked everywhere for the solution to this and have tried many things. There is one post on SE related to this and I tried the suggested answer but I am still having problems. We have a server running Server 2008 R2 Standard x64. I need to increase the space of C: since the free space is running very low. However when I open Server Manager and try to go to the "Disk Management" snap-in it just hangs. There is a status message on the bottom of the window that says "Connecting to Virtual Disk Service...". Here are the steps I have taken: Ran sfc /scannow Set all of the drives to be dirty and rebooted so that they would be scanned Executed chkdsk /f /r /b /v on all of the drives. Checked for Windows updates (none). Verified that the services "Virtual Disk", "RPC Procedures" and "Plug and Play" are all running. One symptom is that the service "Virtual Disk" does not cleanly shut down. I receive a message about the process being unexpectedly terminated when I try to stop or restart it. Also I cannot find anything relevant in the event logs. Any ideas or suggestions?

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• My system is always disk-bound (the disk light is always on). Why is this?

  - by Scoobie

  I have been given a laptop by the good folks at my company on which to do my work (Java development). I usually use eclipse as my primary development platform. The laptop is a Dell D830 and runs Windows 7 - 32 bit. Although the processor supports a 64 bit instruction-set, licensing limits me to running the 32 bit OS. The HDD is a WD1600BEVT (Western Digital). I have noticed that my disk is always very slow. Windows start up is usually pretty quick, however as soon as I log on, my disk light stays on and usually, the laptop takes about 4 minutes (after logging in -- immediately upon getting the prompt to press Ctrl + Alt + Del to log in) before it's usable. Questions: Is this expected behavior? What can I do to examine the disk and determine the cause of the problem? What can I do to improve my disk's performance? Any optimizations you may be able to suggest? Other Questions: Some have suggested running Process Monitor (from sysinternals), but how would i get the log since start up? Instead of trying to fix this myself, should I simply push this onto the system administrator? Thanks all.

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• Win32 API P-Invoke to bring a disk online, offline, and set unique ID

  - by Andy Schneider

  I am currently using Diskpart to accomplish these functions, but i would like to be able to use P-Invoke and not have to shell out to an external process in my C# app. The example Diskpart scripts are: //Online a disk Select disk 7 disk online // Reset GPT Identifier select disk 7 UNIQUEID DISK ID=baf784e7-6bbd-4cfb-aaac-e86c96e166ee I tried searching pinvoke.net but could only find functions that dealt with volumes, not disks. Any idea on how to accomplish these diskpart commands using Pinvoke?

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• The 35 Best Tips and Tricks for Maintaining Your Windows PC

  - by Lori Kaufman

  When working (or playing) on your computer, you probably don’t think much about how you are going to clean up your files, backup your data, keep your system virus free, etc. However, these are tasks that need attention. We’ve published useful article about different aspects of maintaining your computer. Below is a list our most useful articles about maintaining your computer, operating system, software, and data. HTG Explains: Learn How Websites Are Tracking You Online Here’s How to Download Windows 8 Release Preview Right Now HTG Explains: Why Linux Doesn’t Need Defragmenting

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• KVM online disk resize?

  - by Eil

  We're evaluting KVM for Linux virtualization on a few projects. All is going well so far. But one of our requirements is the ability to add disk space to a running guest without rebooting or taking it offline. Is this possible with KVM? The only thing I've found so far (but have not tested yet) is the ability to hotplug disks into the machine. If I go this route, then I could always add the new disk to an LVM volume group on the guest and then extend the chosen logical volume. The biggest downside to this approach is that over time we might end up with guests having variable numbers of virtual disks. The "real" disk space would be provided to the host over a SAN, so we can always add more space to the host whenever.

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• Fix bad blocks on Mac hard disk

  - by Andrew Vit

  I have a hard disk that I scanned with TechTool and it reports one bad block. As far as I can tell, TechTool only scans and reports a failure. It doesn't fix anything. Back in the day, Norton Disk Doctor did the job of scanning and flagging (remapping) bad blocks on the Mac. Today we have various tools for fixing up HFS+ directory errors (Disk Utility, fsck, DiskWarrior, TechTool), but I don't know of any tool that will do a surface scan and fix the bad blocks too. What software is available for this? If I know the address of the bad block, is there a low-level terminal utility for marking it?

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• Bootloader error Ubuntu 12.04, system goes to Grub-rescue instead of booting

  - by user83508

  I am trying to install ubuntu 12.04 on my system but it is constantly giving me bootloader install fail error. I have tried to lot to solve this issue but reading articles over the internet but still no gain. Firstly since the bootloader was not getting installed I tried to install it on all the alternative paths given in the installer, failing with I selected install ubuntu without bootloader. Then I tried to manually install bootloader via terminal at try ubuntu via grub-install, but I was not able to do that. Then I tried using boot-repair and it was also not able to install the bootloader because after it my system shows grub-rescue. I tried to use boot-repair and install bootloader on a seperate partition mounted to /boot and still my system is booting and it still shows grub-rescue. The error which my system shows during boot is: Error : no such device : 04ac0510-bd4f-43b8-b885-b885-11c4dec21db8 I am not dual booting and ubuntu is the only OS I am installing. I am using Raid 0 with two blue western digital hard drive so I am not sure whether it is right or not. The details given by boot-repair are in the below mentioned link; http://paste.ubuntu.com/1147208/ Afterwards, I made one more change I installed ubuntu again and this time I installed the bootloader at a different partition on /boot. After this the bootloader error has gone but I am still not able to boot to ubuntu as I get the same error I was getting before. I have not installed dmraid, I feel it is neccessary for Raid0, but I thought ubuntu already has Raid drivers. Moreover in the dmraid installation instructions for 12.04, I used the one for 10.04 and selected to install bootloader at the partitions from the dropdown. This time the installation finished normally without an error but still I am not able to boot my system as the same error shows during booting this time also. Now I am stucked and I have no clue on how I can boot my system. Please tell me how can I boot my system.

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• Truecrypt or default Disk Utility on Mac?

  - by Kaushik Gopal

  Windows by default doesn't come with a password protect folder option (other that Win7 ultimate), so I used to swear by Truecrypt which was great. But I've read in a couple of places that Mac OS X by default has a way of protecting folders using the Default Disk Utility. So my question is which is better, using TrueCrypt on the Mac or just sticking with the default Disk Utils app? Can somebody let me know the advantages of one over the other? A summary from the very helpful answers below: if you're looking for cross-platform usage Truecrypt is the obvious tool of choice if you're looking for convenience, and intend to stick only to the Mac platform, use the default Disk Utils app.

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• Program complains not enough disk space even if the disk space exists

  - by user1189899

  I have an EXT3 partition mounted in ordered data mode. If a power failure occurs when a program is creating files on that partition, I see that space usage reported is normal and I don't see any partial written files. But when I try to run the same program again after the system comes back up it complains that there is not enough disk space. Even though the free space reported is far more than required. The program always succeeds in normal conditions. Also the problem seems to disappear when the partition is remounted. I was wondering what could be the right way to handle the situation other than unmounting and remounting.

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• Disk Response Time in Windows 7 Resource Monitor?

  - by Keith Nicholas

  In the resource monitor I'am looking at the disk response time. There are a lot of processes where the response time is thousands of milliseconds consistently, I'm pretty sure this is the source of my computer slowing down. I'm not sure what normal response times are though? I'm running win 7 64bit ultimate. This is running on a new computer, i5 with a terabyte drive, 4gigs of ram, etc, disk is still pretty much empty, so it should all be pretty snappy. And if it is going really slow, how do I track down whats causing it? I've turned off things like real time virus protection as experiments to see if there is something weird there, but makes no real difference (other than it doesn't contribute to the problem by accessing the disk)

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• Scan disk runs on every boot with Windows XP

  - by Sarfraz Ahmed

  I have four drives on my computer. The problem is that each time I start the computer the scan disk check (CHKDSK) runs for a drive even if I shut down my computer properly. I ran the thorough scan disk check but still for that drive, the scan disk check is always performed no matter what. I wonder what is wrong although everything is fine and accessible along with drive data. Could you guys please help me out of this? I am using Windows XP SP2. Thanks.

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• How to clone a VirtualBox Disk

  - by [email protected]

   How to clone a VirtualBox DiskCopying the image of Virtual Disk (.vdi file) is a convenient way to duplicate the disk, in cases you want to avoid re-installing an operating system from scratch. However, simply copying the .vdi file into another location will make a verbatim copy of the virtual disk, including the UUID of the disk. If you try to add the copy in the Virtual Media Manager, you will get an error like this:In this case, you have to do is to clone the vdi disk: cd C:\Program Files\Sun\VirtualBox\C:\Program Files\Sun\VirtualBox>vboxmanage clonevdi G:\VMWARES\Database\11GR2onOEL5forVbox\11GR2_OEL5_32GB.vdi G:\VMWARES\Database\11GR2onOEL5forVbox\OEL5_32GB.vdi$ VBoxManage clonevdi Master.vdi Clone.vdiIn case you receive a error like this. It means that the disk is already a copy of other VirtualBox Disk.In that case you chould change the UUID before to clone the Disk.Follow the steps given here in order to do that.

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• FTP Reporting Disk Quota Exceeded

  - by Austin

  I am using Notepad++ with FTP_Synchronize to upload files to a server, however, it appears that it is not allowing my file to upload because apparently the "Disk Quota Exceeded" 11:18:49 > -> TYPE I 11:18:49 > Response (200): Type set to I 11:18:49 > -> PASV 11:18:49 > Response (227): Entering Passive Mode (*,*,*,*,*,*). 11:18:50 > -> STOR /home/*/../../var/www/html/test.html 11:18:50 > Response (150): Opening BINARY mode data connection for /home/*/../../var/www/html/test.html 11:18:50 > Response (552): Transfer aborted. Disk quota exceeded Now it may appear that yeah my Disk quota is exceeded, however I've gone to the back-end and saw: Total Used Bandwidth 107.055 MB Allowed Quota 3,000.0 MB Note: Stars were put in place for irrelevant data.

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• Disk image of a Windows 2000 NTFS hard drive

  - by Federico

  Hi, I need to create a disk image from a Windows 2000, NTFS formatted, hard drive. This image has to be used to create backup hard drives to replace the original disk in case an emergency situation arises. This is a medical equipment, so I cannot physically disconnect the disk because I would violate the warranty of the equipment. This machine has a DVD R/W, ethernet and USB 2.0 access, and we have the rights to install any application I want in the Windows 2000 system. 1) Is there any way to do this without installing any new software in the Windows 2000 system, so it is the least invasive as possible? 2) If we have to install a software to do the backup, which software do you recommend? Any hint will be greatly appreciated. Thanks in advance, Federico

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• Why isn't Startup Disk Creator working in 12.04?

  - by Steve Kelem

  I'm trying to create a bootable USB stick (7.5G) for Ubuntu 12.04 (x86_64) from another Ubuntu 12.04 x86_64 PC. I downloaded the Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425). When I run Make Startup Disk, I selected the downloaded release. The drive shows up with a capacity of 7.5GB and a blank space under "Free Space". I have tried using the "Erase Disk" button, which seems to erase the disk. The problem is that the options below the "Disk to use" section are grayed out. The "Make Startup Disk" is colored dull orange, while the source disc image and device to use are bright orange. The "Make Startup Disk" button doesn't do anything when I click it. The only working buttons are "Other...", "Erase Disk", and "Close". Upon using Other button to select the ISO, it allows to select the ISO but it doesn't load and the "Source Disk Image" field remains empty.

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• Ubuntu 12.04 installation on GPT + RAID going into grub rescue

  - by Proy

  I have two 2TB disks. I am installing Ubuntu 12.04 using the alternate version of the server cd. On the partitioning page I have done my partitioning as follows /dev/sda1 - 32 MB - bios_grub /dev/sda2 - 50 GB -raid device /dev/sda3 - 8 GB -raid device /dev/sda4 - Balance full GB - raid device /dev/sdb1 - 32 MB - bios_grub /dev/sdb2 - 50 GB -raid device /dev/sdb3 - 8 GB -raid device /dev/sdb4 - Balance full GB - raid device After this I have setup raid devices /dev/md0 for /(/dev/sda2 + /dev/sdb2) for / ext4 /dev/md1 for swap( /dev/sda3 + /dev/sdb3)for swap /dev/md2 for /home(/dev/sda4 + /dev/sdb4)for /home ext4 The installation finishes it shows that it is installing grub to /dev/sda and /dev/sdb. But once the system reboots it falls into grub rescue mode. on doing ls I can not see the md devices only hd once. I also tried booting into rescue mode with the install cd and doing grub-install /dev/sda and /dev/sdb. What am I doing wrong ? Why is grub2 not detecting the raid revices ? UPDATE: I just did the same steps with Ubuntu 10.04 and it worked perfectly fine. I wiped out the RAID and partitions and everything and did it from scratch. I think the issue is with Ubuntu 12.04 and the way it partitions 2 TB disks

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• Virtual Machine files on ramdisk doesn't run faster than on physical disk

  - by Landy

  I installed total 36G memory (4x8G + 2x2G) in the host (Windows 7) and I used ImDisk to create a 32G ramdisk and format it to NTFS file system. Then I copied the virtual machine (in VMware Workstation format) folder, including vmx, vmdk, etc... to the new created ram disk. Then I tried to power on it in VMware Workstation. What made me surprised is that the performance is not better than before. It cost almost the same time to power on the Windows 7 VM. I check the Resource Monitor in the Windows 7 host, and the statistics of CPU, disk, network are rather normal. The memory has reported 3000+ hard fault/sec when guest OS boot then drop to 0 after the guest powered on. Any idea about this issue? I had thought the performance of ramdisk will be better than physical disk in this case. Am I wrong? Thanks.

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• Dynamic Disk: Revert back to basic or...?

  - by someguy

  When I was trying to create a new partition (via Disk Management) it warned me that the disk would be dynamic, but I thought it meant the partition and went ahead. Now, my hard disk, which has the main C partition, is dynamic. I haven't shut down the computer, and I'm not sure what the consequences are. Should I revert back to basic or...? What ever happens, I don't want to lose my data. Edit: I think I should mention that I don't know how to revert back to basic...

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• Hard Drive Fundamentals And Verifying Disk Performance

  - by Agnel Kurian

  Over the past few months, my Windows XP machine has slowed down to a crawl. It takes about 10-15 minutes to go from power-up to reaching a responsive state. I have reasons to believe that this is a result of the hard disk slowing down. Questions: Do hard disks slow down as a result of mechanical wear and tear ...or age? How do I check if my disk has slowed down? Conversely, how can I verify that my disk is indeed running at the speed it's designed to run at? Could drivers be at fault here? Do hard disks come with drivers or does Windows use a generic driver?

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