Am 21.06.26 um 16:12 schrieb Michel Verdier:
On 2026-06-21, Paul Leiber wrote:
I just noticed that I didn't manage to make clear that (1) I don't think that
there is one specific failed partition, but that both partitions containing
databases seem to work, but not at the same time, and that (2) I want to keep
the data on the seemingly failed device.
[...]
I used raid for tens of years and never had the problem you described. So
I believe it should come from something else than raid failure. raid
duplicates data on both partitions. If you don't have a failed partition
the duplication is done transparently and quickly (<second). When a
partition fails you can add a new and clean partition and the original
one, the partition still in raid, is synchronized into it. As others told
you you should use smartd to monitor your disks.
My knowledge in IT is limited. I just can describe what I can observe and make
guesses. (The md RAID is part of a setup I do for fun at home.) I know that it
sounds strange, but my best guess is that there are two differing databases
stored on my hard drives. How else can the repeated switch between different
data sets be explained?
To comment on your suggestion to monitor hardware status of the disks: Both
disks are monitored using smartd (short and long tests being conducted on a
regular basis), smartctl doesn't indicate any issue with the drives.
