Thanks, haven’t tried it yet, but have tried one other thing: Plugged a good drive into one of the suspect bays and… not recognised.
Went through drive details again and another oddity is that sdh does not exist. It’s an 8-bay unit so we should have devices sda through sdh.
To summarise
- I have two drives making up a RAID1 Raid group / storage pool and one good spare drive (just empty, not configured as a spare as such)
- Any drive in bays 5 and 6 will report as non-existent in QNAP storage manager
- One of them exists as
/dev/sdg, the other just doesn’t exist. There are 7sd*devices in the system - Any of the three drives in bay 8 is fine
So it seems to suggest a backplane issue with these two bays.
But the big problem that remains is: Why will it not recognise my storage pool in bay 8? It sees a RAID volume on there but decides it’s not worthy, and the recovery scan also doesn’t find it.