20190825 Synology DS212J 2 bay NAS is not seeing Disk 1
Symptoms:
- NAS alert beeping
- Logged into admin, dashboard showed Raid 1 (Mirrored) 2 drive array degraded
- Storage manager -> HDD only showing Disk 2, no Disk 1 showing
- Moved NAS contents elsewhere
- Deleted Storage volume 1 to hopefully speed up any rebuild
Solution Attempt 1 (Success = NO):
- Replaced Disk 1, still the same problem, cannot see Disk 1
Solution Attempt 2 (Success = YES, can see Disk 1 in Storage manager):
- Disk 1 is connected to the main board by a plugin riser
- Removed both disks
- Removed disk brackets screws, removed frame/riser
- and applied contact cleaner to both ends
- Fitted riser inserting/removing a couple of times
- Refitted both disks
- On power up, logged into admin panel, can see both disks
- Disk 1 showing system partition failed
- Initiated repair on the volume etc