Re: [Xen-users] Xen with LVM

[Errol Neal <eneal@xxxxxxxxxxxxxxxxx>]

Quoting "IDAGroup - R.W.Muller" <robin@xxxxxxxxxxx>:

> Ok, I guess it has not really something to do with LVM, cause I just
> installed a (working!)
> Centos5 guest into a (also working) Centos5 dom0 as imagefile. When I
> try to mount the image
> I get:
>
> [root@serv106 ~]# mount -o loop /disk.img /mnt/loop/
> mount: you must specify the filesystem type
>
> So, very similar to the error before (actually the same). What is wrong
> with my guest installation
> that those are booting fine, but are not mountable?
>
> Thanks for any help here,
> Robin
This is because you are attempting to mount the entire disk.
use sfdisk -l -uS /disk.img to determine what sector the partition you  
wish to mount starts at. then mount it with the offset option. For  
example:
server30:/etc/xen/vm # ls /dev/xendata/
volume0  volume1  volume2  volume3
server30:/etc/xen/vm # sfdisk -l -uS /dev/xendata/volume3

Disk /dev/xendata/volume3: 0 cylinders, 0 heads, 0 sectors/track
Warning: The partition table looks like it was made
  for C/H/S=*/255/63 (instead of 0/0/0).
For this listing I'll assume that geometry.
Units = sectors of 512 bytes, counting from 0

   Device Boot    Start       End   #sectors  Id  System
/dev/xendata/volume3p1   *        63  20964824   20964762   7  HPFS/NTFS
/dev/xendata/volume3p2      20964825 125821079  104856255   7  HPFS/NTFS
                start: (c,h,s) expected (1023,254,63) found (1023,0,1)
/dev/xendata/volume3p3             0         -          0   0  Empty
/dev/xendata/volume3p4             0         -          0   0  Empty
server30:/etc/xen/vm # mount -o loop,ro,offset=$(( 512*63 ))  
/dev/xendata/volume3 /mnt/windows/
server30:/etc/xen/vm # ls /mnt/windows
AUTOEXEC.BAT            Inetpub        System Volume Information  pagefile.sys
CFusionMX7              MSDOS.SYS      WINDOWS                    qpmd8378.bin
CONFIG.SYS              NTDETECT.COM   boot.ini
Documents and Settings  Program Files  msizap.exe
IO.SYS                  RECYCLER       ntldr

If you image contains a LVM partition, then it becomes a bit more complicated.
Use losetup with the offset option to loop your image/partition
Use pvscan to scan the loopback device
Use vgchange -ay to activate the volumes
Mount the volumes.

Let me know if that answers your question..

-Errol


----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.



_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users