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Disks failing in a stretch MetroCluster FC due to multiple scsi.cmd errors

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Applies to

  • ONTAP 9
  • Stretched MetroCluster FC
  • ATTO FibreBridges

Issue

  • ONTAP reporting multiple scsi.cmd and high latency errors for disks:

Mon Apr 03 05:57:53 +0100 [JIFN1001: slifc_intrd: scsi.cmd.checkCondition:error]: Disk device 3a.125L13: Check Condition: CDB 0x28:015b3800:0200: Sense Data SCSI:aborted command -  (0xb - 0x4b 0x4 0x50)(2). 

Mon Apr 03 05:59:04 +0100 [JIFN1001: disk_latency_monitor: shm.threshold.highIOLatency:error]: Disk 3a.125L13 exceeds the average IO latency threshold and will be recommended for failure.

  • The disks are put in maintenance and eventually failed
  • All scsi.cmd errors are pointing to a specific SAS port on an ATTO bridge
  • Errors contunue even after the failed disks are replaced

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