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[Xen-devel] VM backup problem

To: xen-users@xxxxxxxxxxxxxxxxxxx, Xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] VM backup problem
From: "Jinesh M.K" <mkjinesh@xxxxxxxxx>
Date: Fri, 22 Jul 2011 11:04:11 +0530
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Hi,

I use following steps for LV backup.

                            lvcreate -L 5G -s -n lv_snapshot /dev/VG_XenStorage-7b010600-3920-5526-b3ec-6f7b0f610f3c/VHD-a2db885c-9ad0-46c3-b2c3-a30cb71d83f8
                            lv_snapshot created


This command worked properly
Then issue kpartx command

                         kpartx -av /dev/VG_XenStorage-7b010600-3920-5526-b3ec-6f7b0f610f3c/lv_snapshot

But this command not return any value.

                         vgscan
                        Reading all physical volumes.  This may take a while...
                        Found volume group "VG_XenStorage-7b010600-3920-5526-b3ec-6f7b0f610f3c" using metadata type lvm2

Here vgscan not show lv_snapshot

Then use mount command, system ask for file system type, I given like this
                
                       mount -t ext3
/dev/VG_XenStorage-7b010600-3920-5526-b3ec-6f7b0f610f3c/lv_snapshot

      
mount: wrong fs type, bad option, bad superblock on /dev/VG_XenStorage-0cc224af-d9ed​-ff0d-7d9d-b7c2a7057011/lv_snapshot
                     missing codepage or other error
                    In some cases useful info is found in syslog - try
                    dmesg | tail  or so

Any help...






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