Detecting Errors By Using Path Health Checking; Error Management - Hitachi XP P9500 User Manual

The number of errors and the time since monitoring started is reset to 0,
and then monitoring restarts in accordance with the changed monitoring
conditions.

Detecting Errors by Using Path Health Checking

HDLM can check the status of paths for which I/O operations are not being
performed and detect errors. This function is called path health checking.
The path health check function periodically checks the status of online paths
regardless of whether any I/O activity is occurring. If an error is detected in a
path, the path health checking function switches the status of that path to
Offline(E). You can use the dlnkmgr command's view operation to check
the path error.
The health check function is implemented by functionality provided by
VMware vSphere ESXi. You cannot disable the health check function or
change the interval between checks.

Error Management

For troubleshooting purposes, HDLM collects information and stores it into log
files.
Figure 2-13 Flow of Data When Collecting Error Information on page 2-22
shows the flow of data when collecting error information.
HDLM Functions
Hitachi Dynamic Link Manager User Guide (for VMware(R))
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