Periodic Data Scrubbing
The most important thing of all – Data Scrubbing.
I perform data scrubbing/ RAID scrubbing periodically via scheduled tasks. RAID scrubbing is a data maintenance feature that inspects volumes and repairs any detected data inconsistencies. The scrubbing process attempts to correct detected errors using redundant data from RAID.
Data inconsistencies are silent killers. You see the files there and think they are ok but they are in fact corrupted.
So, at the very least, religiously perform data scrubbing.