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ReadyNAS 214 data corruption issue
I am seeing a very strange behaviour that results in corrupted files. My NAS (ReadyNAS 214) has been stable for years, until recently I found a single file had an error revealed via the logs followin...
aks-2 wrote:I am using X-RAID, with 4TB + 4TB + 8TB + 8TB, and been stable for a very long time.
Errors on md124 suggest that you've vertically expanded the volume at least 3 times (md124, md125, md126, and md127 all exist).
Normally I'd expect disk errors to go along with the btrfs errors.
How much free space to you have on the volume?
aks-2 wrote:
I wondered if the firmware upgrade and/or defragmentation might be the cause, but I observe others (including yourself) at least using 6.10.9.
I have several ReadyNAS running 6.10.9, and haven't seen any signs of BTRFS problems.
Thanks StephenB , yes this NAS has been expanded at least twice, although during the last upgrade I did upgrade 1 x 2TB and 1 x 3TB both to 8TB, so expansion probably happened on each upgrade (even though I saw it as one).
Right now, I have 7TB free of 14.54TB reported on the dashboard.
aks-2 wrote:
Right now, I have 7TB free of 14.54TB reported on the dashboard.
So lack of free space can be ruled out for sure.
Absolutely:
root:/# df -h -T Filesystem Type Size Used Avail Use% Mounted on udev devtmpfs 10M 4.0K 10M 1% /dev /dev/md0 ext4 3.7G 653M 2.9G 19% / tmpfs tmpfs 1009M 0 1009M 0% /dev/shm tmpfs tmpfs 1009M 488K 1009M 1% /run tmpfs tmpfs 505M 8.6M 496M 2% /run/lock tmpfs tmpfs 1009M 0 1009M 0% /sys/fs/cgroup /dev/md127 btrfs 15T 7.6T 7.1T 52% /data /dev/md127 btrfs 15T 7.6T 7.1T 52% /apps /dev/md127 btrfs 15T 7.6T 7.1T 52% /homeTry running smartctl -x on each drive, and see if there are any disk errors that for some reason aren't in the logs.
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