[Ingaz]

The interesting point for me was:

> Every failing hard drive requires a stressful operation on the remaining disks (resilvering) that may push the next drive to failure.

I saw something similar: RAID array with 5 disks and 3 spare disks. One night controller detected failure, ejected one drive and replaced with spare. After rebuild of RAID it ejected another disk and then another. In an hour all spare disks were used and on fourth failure it stopped work

What was probability of such series of failures?