General :: Mount - How To Use Qcow2 Disk Image
Dec 27, 2010
I have a large qcow2 formatted disk image, which I use as storage. Often I need to move data to and from this disk image. I mount the disk using the qemu-nbd tool as follows:
modprobe nbd max_part=63
qemu-nbd -c /dev/nbd0 /host/disk100G.img
mount /dev/nbd0p1 /home/rup/disk
But disk access fails every now and then in the midst of some I/O operation with an "Input/output error". At that point I have to manually unmount the disk and re-mount it so that I can run the program again:qemu-nbd -d /dev/nbd0umount joborkhaki/What could be the reason for this? Is there a better tool that I can use to maintain a qcow2 disk image?
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May 22, 2011
is there a way to write/unpack .qcow2 hard disk image directly to real hard drive in Linux?(I know it's possible to unpack .qcow2 to .raw and then dd to drive, but I'd like to skip .raw since its large)
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Aug 2, 2010
I am having a rather strange issue. I have windows 98 installed into a disk image that I use bochs to boot it with. I want to transfer some files to the image but now I am unable to mount it. I will attach the drive to the loopback device but when I go to mount I get wrong fs type bad option ... etc.
The command I used to mount was
Code:
#mount -t vfat /dev/loop0 /media/loopdisk
cfdisk shows it ok as does fdisk. shows as a fat16 file system. When I attempt to check it for errors using fsck.msdos I get
Code:
# dosfsck 3.0.6 04 Oct 2009, FAT32, LFN
# Logical sector size (64543) is not a multiple of the physical sector size.
When I boot into windows 98 in bochs and check the disk it tells me there is no problems.
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May 18, 2010
I'm trying to set up a virtual machine environment in Centos5.5. My hardware fully supports virtualization, and I'm running qemu as the hypervisor with Virtual Machine Manager as the GUI to manage and create VMs. Host hardware is a Dell PowerEdge T710, with a quad core Xenon processor and four 1TB disks in a raid 6 array.
Within the Virtual Machine Manager when trying to create a new VM, there is the option to not "allocate entire virtual disk now". What format is created when you "allocate entire virtual disk now" and when you don't?
I want to create a qcow2 image format, but it doesn't look like it is supported. Does anybody know how to create a VM with a qcow2 image format?
When you create a blank disk with "qemu-img create -f qcow2 disk.qcow2 3700G", it indeed does create a qcow2 image. However, Virtual Machine Manager is unable to read these images, claiming that it is 15 megs or so in size (which is what it actually occupies in host disk space until you try and put a VM into it).
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Sep 28, 2010
Is it possible to mount a virtual disk image like qcow2 as a rw filesystem? I would assume guestfs could do it, but I couldn't figure it out from the man page. Basically I want to be able to read and write to the contents of a Windows virtual machine, just like I mounted a physical disk.
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Jan 17, 2011
This probably is something simple, and may have already been addressed on here.I have a 1.4MB floppy disk image file that I would like to mount as a drive.
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May 15, 2010
Simple question, which implies lot of complexity, unfortunately : how to install Clonezilla and mount multi-partitions cloned image disk under DEBIAN ?
Wishing that one day Linux would be so easy and complete as Windows. But we are gaining more users, so Linux will have more apps
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Mar 13, 2010
I need to mount an ISO image on Linux. On Windows I use Daemon Tools, but how is this done on Red Hat Enterprise Linux 5.4?
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Feb 16, 2011
I was given a forensic Image which I now know is a DD image of the drive (Vista) and am trying to mount the image or extract the image to another drive. I'm not sure of the extention type or if the image is a partition or the entire drive. I think it is the entire drive.
Is it possible to mount a DD image to a device. If I can't do that I just want to extract the files to run some programs against the drive. Can I view the files under Ubuntu or do I have to remove the drive and stick it into a Vista computer.
I purchased a second drive today and was hoping the command line would be something simple.
Or am I on the wrong track, should I be doing this all in a windows environment. The reason I picked ubuntu was because of the reporting tools.
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Feb 2, 2010
Sorry I am not a linux user at all. I have a linux image that needs to be installed. I have the image on a USB drive. Not really sure what I should be doing, but local disk seemed to make sense, however, when I select the usb drive I get an error, that the image can not be found
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May 10, 2010
I have problem to mount a compressed (ISZ) image under Linux, which was created by e.g. UltraISO? I am aware about user-space fuseiso, but it fails to mount these images, as I have reported in Debian bugtracker (correct me if I ddi something wrong). I ask the community for a help: I need a proved solution to mount these images without decompressing them.I believe that CONFIG_ZISOFS kernel option cannot help, as it refers a special RockRidge extension (per-file compression with mkisofs -z or mkzftree).
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Jul 13, 2011
How to create the FS image and mount the same ..?
I need to store some data in the image which I'll be creating ..?
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Jul 28, 2010
I am new to the Linux world and I am not sure if what I am trying to do is achievable or not. I am trying to make an image of my existing drives running Linux on a USB and I want to use the same image off the USB to clone more bootable hard drives. Something like what Ghost does in windows. The problem is using 'dd' the image is too big ( I have 1tb drives ) and then I am not sure how to convert these images back on to new drives so that they boot in the OS as well. i am not sure if there is a utility that would let you do that?
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Apr 5, 2010
I want diskboot.img for fedora 12. How to get it.
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May 17, 2010
How to boot an iso image from hard disk. I have created a linux live cd with remastersys. I want to test it. So I want to boot it from my hard disk.
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Apr 6, 2010
How do I create/boot a ram image from a disk? I'd like to create a linux installation that is booted from a USB or CF drive and after boot does not access the disk.
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Mar 7, 2010
I have an image of the entire disk created using dd. The disk structure follows:
The image was created using:
How would I, if it is possible, mount /dev/sda1 from the image so that I'm able to read the contents?
It's not an option to clone the HDD again, I know how to do it if I had only cloned the single partition by itself. I hope it's still possible with the current image.
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Apr 6, 2010
If you have a hard disk image (including partition table, multiple partitions,...), is it possible to let Linux treat it as a regular hard disk?
By "regular hard disk" I mean I would like to have the image show up as, for instance, /dev/hdx and its partitions as /dev/hdx1,...
(I know I can mount one of the partitions in the image using "mount -o loop,offset=x ..." but I don't really like this option.)
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Nov 16, 2010
I downloaded an raw SD card image that has two partitions. It caused some file system errors when I tried to dd it directly into an SD card. I am not sure if the card is defective or the image. Is there a way to examine this image without writing it to a physical card? Like trying to mount the partitions separately or checking the tables?
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Jan 6, 2011
I recently installed Linux to run a few Linux based tools on a disk images I have, and I can't seem to copy the disk image over to my ext3 partition.
The particular distibution I'm using is BackTrack 4 r2, which is Ubuntu based. I can't seem to find specifically which version of Ubuntu is being used. The disk image is 108GB. It is currently located on a NTFS partition on a SATA hard drive connected directly to the computer. The ext3 partition is located on a second SATA hard drive connected to the same computer. It has 200GB total. I do not remember exactly how much free space it had but "df -h" showed a lot more than 108GB. The computer has 4GB of RAM and I gave it 8GB of swap space.
At this point it has been running for more than 12 hours. This is far longer than I would expect it to take had I been copying the file under Windows. How ever I do not have much experience with Linux, so if it's supose to take this long please let me know. I am planning on letting it run until I wake up tomorrow.
"cp -v" hasn't been very verbose at all. The only sign I have that indicates the computer is still trying to do something is the HDD light on my chasis that has stayed lit this whole time.
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Mar 24, 2010
Is it possible to boot from a disk image file(containing linux) file that resides inside windows and add a bootloader entry for booting from the disk image.?
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Mar 9, 2010
I deleted some files on the command line and would like to learn if it's possible to recover them. It's not a terrible thing if they are gone, but I want to see what I can do. The server is configured as a hardware RAID5+1 (ext3, Debian Stable) and I *really* don't want to take a dd of the entire disk.
ls -id gets me the inode value of the directory(155655)
I'd like to create a disk image starting at that specific inode. Then there is the issue of picking an outer boundary of the disk image. I'm hoping there's a dd/ext3 genius out there to advise.
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Jan 12, 2010
I try to mount one disk image to two points.
sudo mount -o loop,user,uid=dm /home/dm/mmm/test_drive1.img /home/dm/mmm/fs
sudo mount -o loop,user,uid=dm /home/dm/mmm/test_drive1.img /home/dm/mmm/fs2
Thats done
But when i create,copy or change anything on one mount point (../fs) its not updates on second mount point (../fs2).
Does anyone know way to 'share' one disk image (.img) to some mount points?
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Nov 15, 2010
Suppose I have a 80 GB hard disk (sda) with 4GB of contents. Using a dd to copy to a different disk
Code:
dd if=/dev/sda of=/dev/sdb
copies all the contents (including free space). So sdb also needs to be 80GB.
You will notice that in VMWare or VirtualBox disk images, it is possible to set the disk to use only the amount of space of actual data. So a 80GB virtualbox/vmware image with 4GB of contents will be 4GB.
Is it possible to do that with an actual hard disk (sda) image? I want to create an image of an actual hard disk, copy it to DVD and transport it (in mail) for restoration on another computer (having same hard disk).
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Mar 17, 2010
Let's say I'm using one of those PCs that uses a SSD flash drive in place of a more regular HDD.
Say I burn my favorite .iso distro and install it on this PC. I install my favorite applications and seek out and install any missing drivers and generally tweak the system like you do. When I am finally happy with it, I make an image of this installation to an external USB drive.
Now, say 9 months later some of those SSD blocks have gone bad because they were erased too often. They're no longer usable. Also, because I'm a sloppy person who can't be bothered to delete redundant stuff and run make-cleans and so forth, the disk is getting pretty cluttered and takes longer and longer to do stuff.
I decide the obvious solution is to remove and save any data I need to keep, then just over-write the disk with the image I made 9 months earlier.
The question is: will the firmware be smart enough to re-map my incoming image to avoid these bad blocks on the SSD? Or am I going to wind up with some parts of the image being located on bad areas of the SSD?
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Jun 13, 2011
At the Get Slackware page at the Slackware website it gives a list of addresses which when I click one of the addresses it redirects to another page with a list of mirror images. Which address and which mirror image do I need to work with Kubuntu 11.04 on my netbook so I can create a USB startup disk? With my connection speed these mirror image downloads take about an hour and a half and I cannot just be guessing which mirror image to download.
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May 31, 2011
i need to mount at least for read access NTFS-based partition image on linux from a file. File is binary copy of a partition. Is there any libraries or resources for this?
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Jul 16, 2011
I have a dd image of a full drive (as a file) that was using Truecrypt system encryption under windows. I want to mount the main partition from that image using Linux's Truecrypt. I am familiar with dd loopback devices and have the partition offset, but I don't know how I can mount it like this because I need to use the truecrypt command.
Is there perhaps some way to create a fake device file for the disk image that I can mount from within Truecrypt?
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Feb 23, 2010
I made a disk image of a vfat fat16 using:
Code:
dd if=/dev/sda of=image_drive.img
I would like to mount it to /mnt/vfat using mount and loop. Is it possible to be mounted?
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Aug 6, 2009
I need little help on live disk creation and disk image backup.
Can I create live disk using my hard drive installation? If yes then, can I restore the fedora from the live disk to the hard drive. I mean to say that from that live disk can I install fedora again in my hard drive.
Second question is, if I create the disk image of my hard drive( including ntfs & FAT32 partition) , can I restore it in a blank drive. If so , then can os will be restored also?
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