xen-users
Re: [Xen-users] mount a .img file
To save yourself from having to calculate an offset, you could also
mount the whole image and then use the "kpartx" command to map out the
partitions for you.
-John
On 1/13/2011 2:05 PM, Chris Petrolino wrote:
Aha that's most likely what I was forgetting! I will give that a shot and
report back. Thanks a million guys
Kind Regards,
Christopher James Petrolino
On Jan 13, 2011, at 5:01 PM, dave<dave@xxxxxxxxxxxxxxx> wrote:
If it's a disk image you need to provide an offset, for example
mount -o loop,offset=32256 /xen/guest.img /mnt/tmp
the offset depends on the partitioning of the disk file. for example:
~$ fdisk -l -u -c guest.img
Device Boot Start End Blocks Id System
guest.img1 * 2048 9920511 4959232 83 Linux
guest.img2 9922558 10483711 280577 5 Extended
guest.img5 9922560 10483711 280576 82 Linux swap / Solaris
this disk image has a 2048 cylinder boot sector, so the offset would be
2048*512, or 1048576
another example:
~$ fdisk -l -u -c guestA.img
Device Boot Start End Blocks Id System
guestA.img1 * 63 1767149 883543+ 83 Linux
guestA.img2 1767150 1992059 112455 5 Extended
guestA.img5 1767213 1992059 112423+ 82 Linux swap / Solaris
this has a 63 cyl boot sector, so the offset would be 63*512 = 32256.
as a shortcut, (in bash shell) you can do this:
mount -o loop,offset=$((512*63)) guestA.img /mnt/tmp
On 01/13/2011 01:51 PM, Steven Timm wrote:
What's the output of
file /xen/guest.img
probably you need to specify -t ext2
but the file command will tell you for sure.
Steve
On 2011年1月13日, Christopher J Petrolino wrote:
Ok guys I am wondering if anyone can help me out here. I am trying to
mount a xen .img file. when I try to do a mount -o loop /xen/guest.img
/mnt/tmp I get a message saying that I need to specify a partition
type.. What am I missing?
Many thanks in advance,
CJP
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