[linux-lvm] LVM recovery / Xen / Testdisk
mitch at bitblock.net
mitch at bitblock.net
Wed Apr 24 00:26:22 UTC 2013
Hello - first post here - I was referred to this group from xen-users.
I started on xen-users, and then went to the testdisk forum. My issue is one of my own causing but has lead to the discovery of a problem I'm trying to understand / resolve in interpreting lvm structure...
The full history is here:
In short, I allowed xen to reinitialize an HBA storage repository. I lost an important VM / some data which I thought was backed up.
I have used photorec to recover VHD files, and some of them work / can be read by remounting them in xen or by using a tool like winimage.
But some of them are damaged. I want to hopefully recover a few files from these LVMs
In some cases I suspect the LVM may be fragmented and testdisk may have recovered separate lvm files when there was really supposed to be a single file.
I'm wondering if there is any way to stitch them back together. Testdisk is normally able to pull partition table data and then navigate through a damaged hard drive / partition / disk image to allow recovery of files and folders.
In the case of my VHD files however it doesn't work. I expect it's got something to do with the way the VHD stores information like the partition table etc. Testdisk doesn't see a normal partition table / is unable to recognize the partition and when I try to force it too my options for recovery are limited.
I've been seeking help from the testdisk forum - but can anyone confirm that lvm2 is what xen is using?
Are there any other recovery tools I should be aware of for this scenario particularly anything on recovering from damaged vhd's or relinking parts of vhd's to their parents, etc.?
Any documentation / pointers would be appreciated! If there is an alternative to using testdisk / treating this like a "hardware failure" and more like a logical reconstruction that would be great, however my attempt at googling / readking lvm2 command man pages didn't show me anything obvious...
Thank you in advance!!
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