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xen-users
Re: [Xen-users] Xen with LVM
Hello Errol, I tried that and get a little weird partition table:
sfdisk -l -uS /dev/vms/centos5_data
Disk /dev/vms/centos5_data: 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/vms/centos5_data1 * 63 3068414 3068352 83 Linux
/dev/vms/centos5_data2 0 - 0 0 Empty
/dev/vms/centos5_data3 0 - 0 0 Empty
/dev/vms/centos5_data4 0 - 0 0 Empty
But other then that, it works like a charm:
[root@serv106 mnt]# mount -o loop,ro,offset=$(( 512*63 ))
/dev/vms/centos5_data /mnt/centos/
[root@serv106 mnt]# ls -al /mnt/centos/
total 184
drwxr-xr-x 21 root root 4096 Oct 11 21:20 .
drwxr-xr-x 3 root root 4096 Oct 11 21:21 ..
drwxr-xr-x 2 root root 4096 Oct 11 21:08 bin
drwxr-xr-x 3 root root 4096 Oct 11 21:06 boot
drwxr-xr-x 2 root root 4096 Oct 11 20:59 dev
drwxr-xr-x 70 root root 4096 Oct 11 21:20 etc
-rw-r--r-- 1 root root 0 Oct 11 21:20 halt
drwxr-xr-x 2 root root 4096 Mar 29 2007 home
drwxr-xr-x 14 root root 4096 Oct 11 21:08 lib
drwx------ 2 root root 16384 Oct 11 20:59 lost+found
drwxr-xr-x 2 root root 4096 Oct 11 21:15 media
drwxr-xr-x 2 root root 4096 Mar 29 2007 mnt
drwxr-xr-x 2 root root 4096 Mar 29 2007 opt
drwxr-xr-x 2 root root 4096 Oct 11 20:59 proc
drwxr-x--- 2 root root 4096 Oct 11 21:20 root
drwxr-xr-x 2 root root 12288 Oct 11 21:07 sbin
drwxr-xr-x 2 root root 4096 Oct 11 20:59 selinux
drwxr-xr-x 2 root root 4096 Mar 29 2007 srv
drwxr-xr-x 2 root root 4096 Oct 11 20:59 sys
drwxrwxrwt 3 root root 4096 Oct 11 21:14 tmp
drwxr-xr-x 13 root root 4096 Oct 11 21:04 usr
drwxr-xr-x 19 root root 4096 Oct 11 21:07 var
[root@serv106 mnt]#
Now I just have to find out, how I can get ride of the Empty partitions
and how to use snapshot for backup and I'm getting closer
to a usable result :)
Thank you very much Errol!
Robin
Errol Neal wrote:
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
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