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IOM3 SAS expander warning for SAS shelf electronics - Encountered a crash

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Category:
disk-shelves
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hw
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Applies to

  • ONTAP 9
  • DS4243
    • shelf module

Issue

DS4243 IOM3 encounter a crash and SAS connector warning.

Example:

[?] Thu Oct 22 03:34:25 CST [HostA: dsa_worker4: ses.exceptionShelfLog:debug]: Retrieving Exception SES Shelf Log information on channel 1b IOM module B disk shelf ID 30.
[?] Thu Oct 22 03:34:25 CST [HostA: dsa_worker5: ses.IOMLogCrash:debug]: Encountered a crash in Exception Log on IOM module B SN [] FW 0212, channel 1b.125L77 shelf ID 30 shelf SN [ ].
[?] Thu Oct 22 03:34:25 CST [HostA: dsa_worker5: ses.IOMLogCrash:debug]: Encountered a crash in Exception Log on IOM module B SN [] FW 0212, channel 1b.125L77 shelf ID 30 shelf SN [ ].
[?] Thu Oct 22 03:34:33 CST [HostA: dsa_worker0: ses.status.connectorWarn:warning]: DS4243 (S/N  ) shelf 30 on channel 0b SAS connector warning for SAS Connector 3: a cable has been removed..  This module is on the rear of the shelf at the bottom center, on shelf module B.
[?] Thu Oct 22 03:34:33 CST [HostA: dsa_worker0: ses.status.ModuleWarn:critical]: DS4243 (S/N  ) shelf 30 on channel 0b SAS expander warning for SAS shelf electronics 2: communication error. This module is on the rear of the shelf at the bottom center, on shelf module B.
[?] Thu Oct 22 03:35:12 CST [HostA: dsa_worker4: ses.status.ModuleInfo:info]: DS4243 (S/N  ) shelf 30 on channel 0b SAS expander information for SAS shelf electronics 2: normal status.

 

Symptoms:

  • System will transition to a mixed path when the IOM reboots to attempt recovery
    • IOM got hung , ACP could not communicate with the IOM
    • ACP issued a reboot 
    • IOM continues to attempt recovery by rebooting

 

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