RAID and LVM - is there a chance of recovery?
Posted: 24 Sep 2015, 00:28
Earlier today I had to reinstall CentOS. I have three volumes, a 300g for OS, and two data drives (1TB and 2TB respectively). During the installation I was asked which of these drives to install on. I selected the 300g drive and left the other two designated as "storage" meaning they are not formatted. I confirmed this by viewing the proposed partition using the installer, note that sdb and sdc are not checked for formatting.
So after completing installation I discovered that neither of my data drives were showing up as valid volumes. In short, linux sees them as empty. Data on the two drives are critical as the CentOS (re)installation happened due to issues with the network stack that caused backups to silently fail.
Here's output from vchk -vvv: https://gist.github.com/anonymous/076cd514c42ec1d0d356
More system info is posted over on Stack Exchange: http://serverfault.com/questions/724369 ... vm2-volume
As a last resort, I installed testdisk and did a basic Search. It sees all three drives and shows the two data drives as LVM2 volumes.
I selected the sdb option and went for Deeper Search just to see what it finds if anything. This test is currently running:
testdisk finishing running and results are not pretty.
This actually seems like "good" news.. that file difference is my data.
So after completing installation I discovered that neither of my data drives were showing up as valid volumes. In short, linux sees them as empty. Data on the two drives are critical as the CentOS (re)installation happened due to issues with the network stack that caused backups to silently fail.
Here's output from vchk -vvv: https://gist.github.com/anonymous/076cd514c42ec1d0d356
More system info is posted over on Stack Exchange: http://serverfault.com/questions/724369 ... vm2-volume
As a last resort, I installed testdisk and did a basic Search. It sees all three drives and shows the two data drives as LVM2 volumes.
I selected the sdb option and went for Deeper Search just to see what it finds if anything. This test is currently running:
testdisk finishing running and results are not pretty.
This actually seems like "good" news.. that file difference is my data.