HP XP Racks - Manual (Page 183)

Changing hdisk attributes
hdisk attributes consist of default values and values actually used. When a
new hdisk is configured, or deleted and then reconfigured, the actual value
for hdisk attributes is set using the default values.
The HDLM default settings modification utility (dlmchpdattr) can be used to
change the default values.
Note:
To change attribute values for an individual hdisk, use the chdev
command instead of the dlmchpdattr utility to change the values actually
used. The following explains how to use the dlmchpdattr utility to change
default hdisk values, and apply them as the actually used values.
If you execute the dlmchpdattr utility with the -A parameter specified, after
the default values are changed, hdisks will be automatically reconfigured.
Note that even though you can execute the utility without specifying the -A
parameter to change the default value, you have to manually reconfigure the
hdisks.
To automatically reconfigure hdisks, perform the procedure in Automatically
Performing hdisk Reconfiguration on page 4-17 . To manually reconfigure
hdisks, perform the procedure in Manually Performing hdisk Reconfiguration
on page 4-18 .
For details on the dlmchpdattr utility, see dlmchpdattr Utility for Changing
HDLM Default Settings on page 7-12 .
Automatically Performing hdisk Reconfiguration
To automatically reconfigure an hdisk:
1
.
Log in to AIX as a user with root permissions.
2
.
Execute the dlmchpdattr utility with the -A parameter specified.
# /usr/DynamicLinkManager/bin/dlmchpdattr -A -a
reserve_policy=no_reserve
A message is displayed to confirm whether processing should continue.
Enter y to continue processing.
If the command terminates normally, the KAPL10571-I message is
displayed.
3
.
Make sure that the default value for the hdisk reservation policy has
changed.
Execute the dlmchpdattr utility with the -o parameter specified.
# /usr/DynamicLinkManager/bin/dlmchpdattr -o
uniquetype = disk/fcp/Hitachi
reserve_policy : no_reserve
KAPL10571-I The dlmchpdattr utility completed successfully.
If the execution environment is a boot disk environment, proceed to step
4. If the execution environment is a local boot disk environment, proceed
to step 5.
HDLM Operation
4-17
Hitachi Dynamic Link Manager User Guide for AIX®