Hitachi Dynamic Link Manager Software Users Guide for AIX (6.6) (T5208-96010, April 2011)

7. Utility Reference
318
-o
Displays the current value set for the reservation policy.
-h
Displays the format of the dlmchpdattr utility.
Notes
• Before you execute the dlmchpdattr utility, stop all application processes that
access HDLM-managed devices.
• Before you execute the
dlmchpdattr utility, make sure that no path errors are
occurring. If there are any errors, the
dlmchpdattr utility might end with an
error.
• If you cancel the execution of the
dlmchpdattr utility by pressing Ctrl + C, the
KAPL10571-I message might be output depending on the timing of the
cancellation. This message signifies that the setting change was not successful. If
this message is output, re-execute the
dlmchpdattr utility with the same
parameters specified. To return the settings to their previous state, make sure that
the above setting change was successful, and then execute the
dlmchpdattr
utility with the original parameters specified.
Examples
In the following example, the utility changes the default hdisk reservation policy to
no_reserve:
# /usr/DynamicLinkManager/bin/dlmchpdattr -a
reserve_policy=no_reserve
KAPL10579-I The HDLM default values will be changed. Is this
OK? [y/n]:y
KAPL10571-I The dlmchpdattr utility completed successfully.
In the following example, the utility displays the current default hdisk reservation
policy:
# /usr/DynamicLinkManager/bin/dlmchpdattr -o
uniquetype = disk/fcp/Hitachi
reserve_policy : no_reserve
KAPL10571-I The dlmchpdattr utility completed successfully.
In the following example, the utility displays Help:
Usage : dlmchpdattr {-a Attribute=Value [Attribute=Value
...]
[-u { HTC | XP }] [-A] [-s] | -o | -h}
Attributes
reserve_policy={ PR_exclusive | no_reserve }
max_transfer=Numeric
queue_depth=Numeric
rw_timeout=Numeric