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

[John Weekes <lists.xen@xxxxxxxxxxxxxxxxxx>]

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 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
> > > >
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