Error Message:

labserver:/ # powermt config
Method error (/etc/methods/cfgpowerdisk -l hdiskpower10 ):
0514-034 The following attributes do not have valid values:
Method error (/etc/methods/cfgpowerdisk -l hdiskpower11 ):
0514-034 The following attributes do not have valid values:
labserver:/ #

Solution:

1) Change the device settings at ODM level using -P

chdev -l hdiskpower10 -a reserve_policy=no_reserve -P
chdev -l hdiskpower11 -a reserve_policy=no_reserve -P

2) Run cfgmgr -v

In above no_reserve was causing the issue. Without reboot issue fix on above case

General Resolution:

For all issues and symptoms, make sure all paths and pseudo devices have the same reserve policies by checking

lsattr -El hdisk(#)/hdiskpower(#)

# chdev -l hdiskx -a reserve_lock=no -P

Command to use with PP5.3 and earlier.

# chdev -l hdiskx -a reserve_policy=no_reserve -P

Command for PP 5.5 +

Reboot.

DO NOT skip this step because  -P causes change to happen at reboot.

# lsattr -El hdisk(#)/hdiskpower(#)

To verify policies match.

# powermt config

# powermt display dev=hdiskpower(#) that was changed to verify that the paths are now active.

# powermt save if everything is correct.