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Re: [linux-lvm] Moving Xen LV to image and mounting the image.




On Nov 14, 2008, at 10:02 AM, Chris Edwards wrote:

installed the xfs module with yum and then deleted all the loopback devices with losetup -d and started over again...

[root wdcxen1 ~]# losetup -a
[root wdcxen1 ~]# losetup /dev/loop0 /root/wdcdns1.img
[root wdcxen1 ~]# losetup -a
/dev/loop0: [0807]:14876937 (/root/wdcdns1.img)
[root wdcxen1 ~]# mount -t xfs -o loop,ro,noatime,nodev,nofsck ~/ wdcdns1.img /mnt/tmp/

Stop doing that! :) When you run 'mount' with '-o loop' it sets up the loop device for you. There is no reason to create the loop device ahead of time.

mount: wrong fs type, bad option, bad superblock on /dev/loop1,
      missing codepage or other error
      In some cases useful info is found in syslog - try
      dmesg | tail  or so

Did you try checking syslog?

Also, if you are trying to mount the original device and the loop back device at the same time, xfs will complain about conflicting UUIDs. If that's what syslog says is going on, and you really want to mount the same file system (one from the original device and one from the loopback), then you will need to use the mount option 'nouuid'.

 brassow


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