Check this link
http://www.redbooks.ibm.com/abstracts/sg245251.html

: Having problem on AIX 4.2.1, SSA raid configuration,
: It creates a RAID 5 ok with memeber disks & hot spare disk, but its not enabling the hot spare
: within the loop. The loop is a simple with F50 machine.

: Also tried with smit option to change attributes of ssaraid, on hot spare enable filed only showing 'false'
: not giving option list of true and false.

: It seems there is problems with ODM.

: Thanks