Problem
The system event log is running over with Event Id 2095 from Server Administrator. “Unexpected sense. SCSI sense data: Sense key: B Sense code: 41 Sense qualifier: 0: Physical Disk 0:1:20 Controller 1, Connector 0”.
Several events per second at the most.
Analysis
https://en.wikipedia.org/wiki/Key_Code_Qualifier shows a list of common Sense Key Codes. Key B translates to aborted command. Key 41 is not listed, but it is very likely that something is not as it should be with disk 20 on controller 1. OMSA can tell you which disk this is, and what arrays it is a part of.
OMSA claims that the disk is working fine, but unless the drive is trying to tell me that it has found some missing common sense, I think I have to respectfully disagree. Such faults are usually not a good sign, especially when they are so prevalent as in this case. So I performed a firmware/driver upgrade as that will often provide some insight. In this case SUU 1809 replaced SUU 1803, that is a 6 month span in revisions.
The upgrade resulted in a new error:
Event ID 2335, Controller event log: PD 14(e0x20/s20) is not a certified drive: Controller 1 (PERC H730P Adapter) .
OMSA tells me that the disk is in a failed state.
Time to register a support case with the evil wizards of the silver slanted E.
Solution
The disk was replaced. OMSA still complains about an error, specifically an enclosure error, but the iDRAC shows a green storage status.
OMSA:
iDRAC:
After restarting all the OMSA services and the iDRAC Service Module service the status returned to green in OMSA as well.
