Can We Distinguish a Failing Disk From a Non-Failing Disk?
SCSI Error Messages alone --> No impending disk failure
- As in the m2 Parity example
Disk Error Messages alone or accompanied by SCSI Error Messages --> High Probability of an impending disk failure e.g.
- ALONE: m0 had only Recovered Error Messages:
- Disk 5 was about to fail and therefore was “fired”
- BOTH: m11 had both Hardware Failure Disk Messages and Time Out SCSI Messages:
- Disk 9 was about to fail and therefore was “fired”