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单个SSD导致性能问题描述

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适用场景

  • AFF
  • ONTAP

问题描述

  • 单个有问题的SSD驱动器可能会在聚合上出现发生原因 性能问题。
  • 如果磁盘已分区、则该磁盘可能会同时影响控制器和多个聚合。
  • 您将在一个SSD上看到高延迟。
  • 您可以在下面看到驱动器2.0.9.P2的延迟非常高
  • clipboard_ee9837a9424ffaa363a35e785aaf4f39d.png

  • 您可能会在事件或EMS日志中看到如下内容:
  • 在此处、您会看到同一驱动器上出现checkCondition错误:

    ?] Tue May 17 08:06:00 +0000 [Hostname-1: scsi_cmdblk_strthr_admin: scsi.cmd.checkCondition:error]: Disk device 0b.00.9: Check Condition: CDB 0x8a:000000019b222800:00000120: Sense Data SCSI:aborted command -  (0xb - 0x2f 0x14 0x0)(4509).
    [?] Tue May 17 08:06:00 +0000 [Hostname-1: scsi_cmdblk_strthr_admin: scsi.cmd.checkCondition:error]: Disk device 0b.00.9: Check Condition: CDB 0x8a:000000019b222928:00000010: Sense Data SCSI:aborted command -  (0xb - 0x2f 0x14 0x0)(4512).
    [?] Tue May 17 08:06:00 +0000 [Hostname-1: scsi_cmdblk_strthr_admin: scsi.cmd.checkCondition:error]: Disk device 0b.00.9: Check Condition: CDB 0x8a:000000019b222940:000000c0: Sense Data SCSI:aborted command -  (0xb - 0x2f 0x14 0x0)(4514).

    驱动器可短时间恢复。

    [?] Tue May 17 08:06:00 +0000 [Hostname-1: scsi_cmdblk_strthr_admin: scsi.cmd.retrySuccess:debug]: Disk device 0b.00.9: request successful after retry #0/#1: cdb 0x8a:000000019b222800:00000120 (5017).
    [?] Tue May 17 08:06:00 +0000 [Hostname-1: scsi_cmdblk_strthr_admin: scsi.cmd.retrySuccess:debug]: Disk device 0b.00.9: request successful after retry #0/#1: cdb 0x8a:000000019b222940:000000c0 (5017).

    此磁盘已分区、因此会影响多个aggrate:

    [?] Tue May 17 08:06:00 +0000 [Hostname-1: wafl_exempt00: wafl.cp.toolong:error]: Aggregate aggr1 experienced a long CP.
    [?] Tue May 17 08:06:45 +0000 [Hostname-1: wafl_exempt00: wafl.cp.toolong:error]: Aggregate aggr2 experienced a long CP.

     

 

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