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NetApp Knowledge Base

Performance impact due to excessive transport errors on single SAS domain

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Category:
metrocluster
Specialty:
metrocluster
Last Updated:

Applies to

  • Multiple drives however all in the same shelf stack
  • Errors from the same SAS domain
  • IOM12
  • ATTO 7500N FibreBridge

Issue

  • Due to excessive transport errors SAS channel multiple disks report aborted commands without a reported cause in EMS:
Tue Jan 28 10:29:15 CET [node1: isp2400_intrd: scsi.cmd.checkCondition.bridge.SAS.event:debug]: Disk device switch2:8.126L518: Check Condition: CDB 0x88:00000001d3618a48:00000058: Sense Data SCSI:aborted command -  (0xb - 0x88 0x4 0xbe)(0).
Tue Jan 28 10:29:15 CET [node1: isp2400_intrd: scsi.cmd.checkCondition.bridge.SAS.event:debug]: Disk device switch1:8.126L516: Check Condition: CDB 0x88:00000001d3620a60:000000e0: Sense Data SCSI:aborted command -  (0xb - 0x88 0x4 0xbe)(0).
Tue Jan 28 10:29:17 CET [node1: isp2400_intrd: scsi.cmd.retrySuccess:debug]: Disk device switch2:8.126L518: request successful after retry #1/#0: cdb 0x88:00000001d3618a48:00000058 (2605).
Tue Jan 28 10:29:17 CET [node1: isp2400_intrd: scsi.cmd.retrySuccess:debug]: Disk device switch1:8.126L516: request successful after retry #1/#0: cdb 0x88:00000001d3620a60:000000e0 (2441).
  • All requests have been successfully retried.
 

 

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