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I had a 500GB disk with BTRFS on it in my NAS. I recently got a 4TB disk and I wanted to use just the new disk, without any downtime. So I ran btrfs replace start 1 /dev/sdb ., waited for it to finish and unplugged the 500GB drive.
Now as I lost access to the 4TB disk, I want to recover all the data off the replaced 500GB disk, but the BTRFS partition on it is no longer recognized as such. I tried to mount it normally, with -o degraded, -o recovery,ro, I even tried btrfs restore and btrfs check, all of which failed. What are my options here?
matega
Posted 2018-01-02T20:56:21.153
Reputation: 204