Error Message:

test:/ # chdev -l hdisk18 -a algorithm=round_robin
Method error (/usr/lib/methods/chgdisk):
0514-018 The values specified for the following attributes
are not valid:

test:/ #

Solution:

Issue found: reserve_policy was set to single_path

  1. Set the reserve_policy as no_reserve
  2. Then, Set the algorithm as round_robin