跳转到主内容

iSCSI超时问答

Views:
15
Visibility:
Public
Votes:
0
Category:
data-ontap-8
Specialty:
SAN
Last Updated:

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

    追加信息

    附加信息 _text

     

    NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.