[londons_explore]

Do you power cycle the disks during regular operations?

There is a failure mode in disks which can be modelled as something fails on the drive, but it continues to work fine for maybe months or years until the next power cycle, upon which it then won't work.

Obviously that's a problem for redundancy schemes because you think you have plenty of redundancy till there is a power outage and suddenly loads of drives fail at once.

I have never seen any of your reports measuring or reporting on these 'fail after power cycle' events, which is surprising.