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[Xen-users] how to run fsck for a crashed domU?

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] how to run fsck for a crashed domU?
From: Rudi Ahlers <Rudi@xxxxxxxxxxx>
Date: 2008年8月01日 13:51:41 +0200
Delivery-date: 2008年8月01日 04:53:00 -0700
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Hi all
I have a CentOS Xen domU, on a CentOS server, which crashed and doesn't boot up. The domU uses a disk image, /home/vm/vm01.img
I get the following in the console:
----snip----
Scanning logical volumes
 Reading all physical volumes. This may take a while...
 Found volume group "VolGroup00" using metadata type lvm2
Activating logical volumes
 2 logical volume(s) in volume group "VolGroup00" now active
Creating root device.
Mounting root filesystem.
kjournald starting. Commit interval 5 second
-----snip-----
So, it's using an LVM file system, on top of the Xen image.
But, then I get this:
----snip-----
Setting up Logical Volume Management: 2 logical volume(s) in volume group "VolGroup00" now active
[ OK ]
Checking filesystems
Checking all file systems.
[/sbin/fsck.ext3 (1) -- /] fsck.ext3 -a /dev/VolGroup00/LogVol00
/dev/VolGroup00/LogVol00 contains a file system with errors, check forced.
/dev/VolGroup00/LogVol00: Inode 67830 has illegal block(s).
/dev/VolGroup00/LogVol00: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
 (i.e., without -a or -p options)
[FAILED]
*** An error occurred during the file system check.
*** Dropping you to a shell; the system will reboot
*** when you leave the shell.
----snip-----
So, how can I run fsck on that file system?
I have tried to mount /home/vm/vm01.img - but it fails:
# mount -o loop /home/vm/vm01.img /mnt/vm01/
mount: you must specify the filesystem type
--
Kind Regards
Rudi Ahlers
SoftDux CEO
Website: http://www.SoftDux.com
Support: http://Support.SoftDux.com
Cellphone: 082 554 7532
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