Mount the first NTFS partition inside a VDI file (VirtualBox Disk Image)

mount -t ntfs-3g -o ro,loop,uid=user,gid=group,umask=0007,fmask=0117,offset=0x$(hd -n 1000000 image.vdi | grep "eb 52 90 4e 54 46 53" | cut -c 1-8) image.vdi /mnt/vdi-ntfs

17
By: Cowboy
2009-08-23 17:25:07

These Might Interest You

  • Assuming we have a disk image, ie. created by dd if=/dev/sda of=image.dd we can check the image's partition layout with fdisk -ul image.dd then, we substitute "x" with starting sector of the partition we want to mount. This example assumes that the disk uses 512 B sectors


    4
    mount -o loop,offset=$((512*x)) /path/to/dd/image /mount/path
    rocku · 2009-11-25 15:49:30 1
  • Suppose you made a backup of your hard disk with dd: dd if=/dev/sda of=/mnt/disk/backup.img This command enables you to mount a partition from inside this image, so you can access your files directly. Substitute PARTITION=1 with the number of the partition you want to mount (returned from sfdisk -d yourfile.img). Show Sample Output


    6
    INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE" "$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]
    Alanceil · 2009-03-06 21:29:13 3
  • This does not require you to know the partition offset, kpartx will find all partitions in the image and create loopback devices for them automatically. This works for all types of images (dd of hard drives, img, etc) not just vmkd. You can also activate LVM volumes in the image by running vgchange -a y and then you can mount the LV inside the image. To unmount the image, umount the partition/LV, deactivate the VG for the image vgchange -a n <volume_group> then run kpartx -dv <image-flad.vmdk> to remove the partition mappings. Show Sample Output


    11
    kpartx -av <image-flat.vmdk>; mount -o /dev/mapper/loop0p1 /mnt/vmdk
    rldleblanc · 2014-09-25 23:05:09 0
  • Assuming we have a disk image, created by dd if=/dev/sda of=image.dd we can check the image's partition layout with fdisk -ul image.dd, then substitute "x" with starting sector of the partition we want to mount. This example assumes that the disk uses 512Byte sectors


    0
    mount -o loop,offset=$((512*x)) /path/to/dd/image /mount/path
    0disse0 · 2011-06-14 19:30:54 0

What Others Think

wow... nice hack
confiq · 438 weeks and 2 days ago
Didn't work for me, even after I installed NTFS-3g. I get "Failed to read last sector (20948696): Invalid argument."
hackerb9 · 437 weeks and 4 days ago
By the way, the 'hd' command is unnecessary if you are using GNU grep which can handle binary files. sudo mount -t ntfs-3g -o ro,loop,uid=user,gid=group,umask=0007,fmask=0117,offset=$(grep -boa -m1 $'\xebR\x90NTFS' WindowsFoo.vdi | cut -d: -f1) WindowsFoo.vdi /mnt Note that I'm using bash's $'\xeb' to represent the non-ASCII hexadecimal byte. I assume other shells have similar escape sequences, but I don't know them.
hackerb9 · 437 weeks and 4 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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