> today I got alerted by mdadm via email that a disk on one of my servers failed. Versions involved: Ubuntu 16.04 Linux hp2 4.4.0-131-generic #157-Ubuntu SMP Thu Jul 12 15:51:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux mdadm - v3.3 - 3rd September 2013