HP Hitachi Dynamic Link Manager Software - Manual (Page 224)

5. Troubleshooting
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5.3 What To Do for a Path Error
When a path error is detected by HDLM, you must immediately resolve the error and
restore the path.
A path error check is performed every time an I/O is issued, or the Windows
plug-and-play functionality detects that a path is disconnected. If there are any paths
through which I/Os are not normally issued, such as a non-owner path, you should
enable path health checking in order to detect any possible errors. For details about
path health checking, see 2.9 Detecting Errors by Using Path Health Checking.
When a path error is detected, HDLM performs a failover on the path and outputs the
KAPL08022-E message. This message indicates that an error has occurred in the
components that make up the path. Figure 5-1: Error Location When the
KAPL08022-E Message Is Output indicates these components.
Figure 5-1: Error Location When the KAPL08022-E Message Is Output
Figure 5-2: Troubleshooting Procedure When a Path Error Occurs shows the
troubleshooting procedure when the KAPL08022-E message is output.