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iSCSI超时问答

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适用场景

  • Data ONTAP 8 7-模式
  • Data ONTAP 7 及更早版本

问题解答

错误消息: [iscsi.notice:notice]: ISCSI: iswta, LUN Reset (from initiator iqn.1991-05.com.microsoft:exch), aborting all SCSI commands on lun 0

错误消息:

[iscsi.notice:notice]: ISCSI: iswta, New session from initiator iqn.1991-05.com.microsoft:exch at IP addr 10.0.0.1

iScsiPrt Information None 34 N/A SOUTHPOINT

iScsiPrt Error None 39 N/A SOUTHPOINT
Initiator sent a task management command to reset the target. The target name is given in the dump data.


iScsiPrt Error None 9 N/A SOUTHPOINT
Target did not respond in time for a SCSI request. The CDB is given in the dump data.

A connection to the target was lost, but Initiator successfully reconnected to the target. Dump data contains the target name.

iSCSI Microsoft软件启动程序

    • 我已从VLD迁移到iSCSI。  迁移后、我会在Windows主机事件日志和存储器中看到以下错误消息。  我正在使用Microsoft软件启动程序。  但是、我的应用程序运行正常。  我是否应该担心?

      iScsiPrt Information None 34 N/A SOUTHPOINT
      A connection to the target was lost, but Initiator successfully reconnected to the target. Dump data contains the target name.

      iScsiPrt Error None 39 N/A SOUTHPOINT
      Initiator sent a task management command to reset the target. The target name is given in the dump data.

      iScsiPrt Error None 9 N/A SOUTHPOINT
      Target did not respond in time for a SCSI request. The CDB is given in the dump data.


      由于主机端SCSI超时、您可能会在存储器的系统日志中看到如下重复消息:
      错误消息: [iscsi.notice:notice]: ISCSI: iswta, LUN Reset (from initiator iqn.1991-05.com.microsoft:exch), aborting all SCSI commands on lun 0
      错误消息:[iscsi.notice:notice]: ISCSI: iswta, New session from initiator iqn.1991-05.com.microsoft:exch at IP addr 10.0.0.1

      当客户端SCSI存储堆栈尝试执行I/O且I/O未在指定时间段内完成时、系统会记录这些错误消息(Microsoft软件启动程序的默认超时值为25秒、有关超时配置的详细信息、请参见知识库:使用Microsoft iSCSI软件启动程序时主机端SCSI超时 。)  如果存储器对I/O的响应速度较慢、则I/O可能需要较长时间才能执行。通常、存储堆栈会重试故障I/O数次、然后再放弃。I/O重试对存储堆栈上方的应用程序是透明的。因此、只要您的应用程序运行正常、此类偶尔出现的错误消息就不应引起发生原因 的关注。
    • 我看到的错误消息与问题1中所述的相同。  但是、我的应用程序运行不好、它们会崩溃。我应该怎么做?

    应结合两个因素来解决这一问题。

    • 我正在使用iSCSI、并且看到问题1中列出的错误消息。我未从 VLD迁移 。 需要做什么?

      如果客户端SCSI存储堆栈尝试执行I/O、而I/O未在指定时间段内完成(Microsoft软件启动程序的默认超时值为25秒)、则会记录这些错误消息。
      如果存储器对I/O的响应速度较慢、则I/O可能需要较长时间才能执行。  通常、存储堆栈会重试故障I/O数次、然后再放弃。  I/O重试对存储堆栈上方的应用程序是透明的。因此、只要您的应用程序运行正常、此类偶尔出现的错误消息就不应引起发生原因 的关注。  但是、如果应用程序出现故障、您可以采取以下补救措施:
      • Microsoft启动程序特定无法访问:
        存在一个Microsoft启动程序特定的可调参数SrbTimeoutdelta、可对其进行调整以处理存储器延迟。  有关如何调整此可调问题描述详细信息和步骤、请参见知识库文章:使用Microsoft iSCSI软件启动程序时的主机端SCSI超时
      • 性能调整:
        用于通过其他协议(NFS、CIFS)解决存储器性能问题的技术也适用于iSCSI。  这样可以缩短存储器延迟、并消除或显著减少错误消息。  按照知识库文章中所述的过程进行操作 :使用iSCSI时主机端SCSI超时

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