Re: Lost LVM data - lost logical volume
On 10/22/2015 02:41 PM, Anton Bizzarri wrote:
Hello, we had lost a drive in a LVM on Debian Squeeze. I pulled the drive
and replaced it and then tried to repair it but then when I tried to
recover the LVM it turned out it was a striped volume. (Its not my server!
Never thought they put the data on a striped volume).
So I returned the original drive and I tried to see if I can recover the
data from LVM metadata.
This is Debian wheezy and lvm2 2.02.95-8
The drive that failed was sdc
...
It is not finding the logical volumes anymore.
I have a file in the archive folder /etc/lvm/archive from the morning
before I ran "vgreduce --removemissing --force data"
Is there any way to restore the metadata? Below is the contents of archive
file.
...
I want to see if its possible to try to recover the data because all the
drives are actually still in the exact same slots. The failing drive on
/dev/sdc magically started working again when I put it back in the server.
You *do* have a back up of your data, right?
1. Make another copy of the back up and take it off-site.
2. Test all of your hardware:
a. Power supply -- hardware load tester.
b. Memory -- many hours; 24 is good.
c. Drives -- use manufacturer diagnostics. Understand that
failures can be caused by data cables, power cables, connectors, HBA's,
RAID cards, MB ports, etc.. Troubleshooting might involve a live Linux
image and/ or hardware substitution/ process of elimination.
3. Optional: Wipe the drives.
4. Build a new array/ file system. (As an aside, have you considered ZFS?)
5. Optional: Backup/ archive your array/ file system meta data.
6. Restore your data.
7. Verify that you can back up the data.
David
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