HP XP P9500 Storage - Manual (Page 234)

When combined with the specification for the number of trace files, the
maximum size of the trace files that can be collected is 1024000KB.
If the value is changed to something smaller than the value that is
currently set, the execution confirmation message KAPL01097-W will be
displayed and the trace file will be deleted temporarily.
The trace files for which a file size can be set are hdlmtrn.log (n
indicates a file number from 1 to 64). The trace files are fixed in length.
Thus, even if the amount of written trace information is less than the
setting file size, the size of each output trace file is always the same.
When all the trace files become full, the new trace data will overwrite the
oldest trace data.
-systfn number-of-trace-files
Specify the number of trace files. Specify a value from 2 to 64.
When combined with the specification for the trace file size, the maximum
total size of the trace files that can be collected is 1024000KB.
If the value is changed to something smaller than the value that is
currently set, the execution confirmation message KAPL01097-W will be
displayed and the trace file will be deleted temporarily.
The trace files for which the number of files can be set are hdlmtrn.log
(n indicates a file number from 1 to 64).
-pchk {on [-intvl checking-interval]|off}
Enables or disables path health checking.
on: Enabled
off: Disabled
For a standby host, or a host connected to the Thunder 9500V series, or
Hitachi AMS/WMS series storage system, we recommend that you
activate path health checking so that you can detect errors in paths
where I/Os operations do not occur.
When you specify on, specify the checking interval of path health
checking by specifying the parameter immediately following on. If you do
not specify a checking interval, path health checking is executed in the
following interval:
¢
When the checking interval has not been specified before:
Every 30 minutes (default setting)
¢
When the checking interval has been specified before:
The previously specified interval
The explanation for the following sub-parameter describes how to specify
the checking interval.
-intvl checking-interval
Specify the checking interval between path health checks. Specify a
value from 1 to 1440 minutes depending on the user environment.
When you change the checking interval, the new setting takes effect
immediately. When the checking interval is shortened and the
checking interval after the change (from the end of the previous path
6-22
Command Reference
Hitachi Dynamic Link Manager User Guide for AIX ®