Sample Scenario
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High Availability Failover Device Status
LDEV PRIMARY ALTERNATE PRIMARY ALTERNATE
PATH PATH STATUS STATUS
----- --------- --------- ------------- ---------------
80 8.0.0 16 Unknown Failure Ready
90 8.0.1 16 Unknown Failure Ready
100 8.0.2 16 Unknown Failure Ready
110 8.0.3 16 Unknown Failure Ready
120 8.0.4 16 Unknown Failure Ready
210 32.0.3 40 Ready Ready
220 40.0.4 32 Array Failure Ready
Incidents Summary
SCSI bus path "8" has failed and all configured HAFO ldevs (LDEV 80, 90, 100, 110, 120) have detected the path failure and have successfully failed over to the alternate path "16". LDEV 210 is still operating using its primary path and requires no action.
LDEV 220 has detected an array failure, probably the array controller attached to SCSI path "40". LDEV 220 device manager successfully has done a failover to its alternate path of "32".
Corrective Action: Failure on System Path "8"
The system needs to be shutdown with diagnostics used to isolate the failing component in bus path "8". Failing candidates are: host device adapter card, SCSI cable, or array controller. Each component needs to be verified.
Corrective Action: Failure on LDEV 220
As indicated by the primary path status for LDEV 220, it's possible that the array controller has failed. This should be verified by an HP support representative, and the system diagnosed to verify the actual broken component. If it is the array controller then in most cases, array controllers can be replaced on-line with host powered-up and array powered-up. After the array controller has been replaced, the primary path can be used again for optimal system I/O performance. Use SYSGEN > IO > HA > GO 220 command to force LDEV 220's device manager to try the primary path after online repairs.
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Appendix A Sample Failover and Recovery |
Appendix B Error Messages |