Disk mounting

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Revision as of 13:39, 15 February 2009 by Root (Talk | contribs) (losetup -- mount individual partitions in a whole disk image)

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fdisk

This will list all the disks that Linux sees. This will not show loop devices. See `losetup` example for more information:

fdisk -l

losetup -- mount individual partitions in a whole disk image

If you have a while disk image and you want to mount partitions inside that image then use `losetup` to create a loopback device for the image.

For example, if you copied an entire disk using `dd` like this:

dd if=/dev/sda of=disk.img bs=32768

You can later create a loop device for it and see its partitions with `fdisk` and mount those partitions individually with `mount`. Note that `fdisk -l` does not normally show loop devices. You must add an explicit path to the loop device that you want to list.

losetup /dev/loop0 disk.img
fdisk -l /dev/loop0

The previous example assumed that /dev/loop0 was free. You can you the '-f' option to automatically find a free loop device. In this example we first use the '-f' option to associate the image file with the next available loop device; then we use the '-j' option to see what loop device was associated with the file:

losetup -f disk.img
losetup -j disk.img

mounting partitions inside a disk image without loop device

It is also possible to mount partitions inside a disk image file directly with `mount` using the 'offset' option, but I have not had luck with this.

mount -o loop,ro,offset=1025 disk.img /media/adhoc