I received an automated email from the mdadm daemon:
A Fail event had been detected on md device /dev/md0.
It could be related to component device /dev/sdh.
I find the wording strange. "could be"? Was it sdh or not?
Does mdadm keep a history of such events with more detail?
I had a spare HDD in the array, so I guess it rebuilt itself, consuming the spare. There is now no mention of /dev/sdh from:
mdadm -D /dev/md0
How can I tell if there really was a failed HDD event, and the identity of that failed drive?
Kind regards,
John.