[Wylug-help] Disk Images and Partitions
Towle, William
william.towle at echostar.com
Thu Jul 5 09:19:35 BST 2007
> I might have dreamed this, but I've got a strong feeling that
> I've been
> able to loopback mount the partitions in an image file,
> sometime in the
> past.
>
> Is this just a fantasy, or have I merely forgotten how I did it?
You may indeed: 'mount' and/or 'losetup' are your friends. `man
mount` covers the various options and caveats thus:
THE LOOP DEVICE
One further possible type is a mount via the loop device. For example,
the command
mount /tmp/fdimage /mnt -t msdos -o loop=/dev/loop3,blocksize=1024
will set up the loop device /dev/loop3 to correspond to the file
/tmp/fdimage, and then mount this device on /mnt. This type of mount
knows about three options, namely loop, offset and encryption, that
^^^^^^
are really options to losetup(8). If no explicit loop device is men-
^^^^^^^^^^^^^^^^^^^^^^^^^
tioned (but just an option â-o loopâ is given), then mount will try to
find some unused loop device and use that. If you are not so unwise
as to make /etc/mtab a symbolic link to /proc/mounts then any loop
device allocated by mount will be freed by umount. You can also free
a loop device by hand, using âlosetup -dâ, see losetup(8).
Wills.
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