Anne Facq <annefacq(a)crpp-bordeaux.cnrs.fr> writes:
Aaron Clark wrote:
> Anne Facq wrote:
>> Hello
>>
>> I use XEN on Fedora 8 with Domu on a LVM partition.
>>
>> Before, on Fedora Core 6, I could backup each Domu by directly
>> mounting the filesystem of the Domu (mount /dev/vg00/lvfoo /mnt)
>> and then running dump on it.
>>
>> On Fedora 8, I can't mount directly the filesystem of the Domu, so
>> I
>
> Pardon if this is a dumb question, but why not?
Because in Dom0 the device for a paravirt Domu (/dev/vg00/lvfoo in my
case) is mapped to a virtual disk /dev/xvda (I created the Domu with
virt-install), and the only way I found to mount this Domu filesystem,
is to :
- get the size of the boot sector of /dev/vg00/lvfoo
(with fdisk -ul /dev/vg00/lvfoo)
= 63
- compute the offset (multiply by block size)
- specify this offset to the mount command :
mount -o offset=32256 /dev/vg00/lvfoo /mnt/
As I can't specify an offset to dump, the command "dump 0 -f lvfoo.dump
/mnt" doesn't work.
Shot from the hip: losetup with the offset?
[...]