Re: [Xen-users] mount a .img file

[dave <dave@xxxxxxxxxxxxxxx>]

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 Thu, 13 Jan 2011, 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
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users

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