11:33:21 <icinga-wm> PROBLEM - MegaRAID on an-worker1090 is CRITICAL: CRITICAL: 13 LD(s) must have write cache policy WriteBack, currently using: WriteThrough, WriteThrough, WriteThrough, WriteThrough, WriteThrough, WriteThrough, WriteThrough, WriteThrough, WriteThrough, WriteThrough, WriteThrough, WriteThrough, WriteThrough https://wikitech.wikimedia.org/wiki/MegaCli%23Monitoring
Has started flapping. A wild guess might say it's the same as the others.
Previous examples:
T308442: an-worker1081 MEGARAID write cache policy alerting
T312626: Replace RAID controller battery in an-worker1082
This is about the 4th in batch to go. Pretty sure they all will at some point if not replaced before.