Originally posted by: andreas_de
Hi,
you may have a look at this: Link:
SAN boot support for IBM System p hosts And for the Version of SDDPCM (eg v2.2.0.0) and Host Attachment Script (eg v1.0.0.11) see Recommended Software Levels for SAN Volume Controller
http://www-1.ibm.com/support/docview.wss?rs=591&context=STPVGU&context=STPVFV&uid=ssg1S1003090&loc=en_US&cs=utf-8&lang=en#_AIX For detailed instructions: Subsystem Device Driver Users Guide
http://www-1.ibm.com/support/docview.wss?rs=540&context=ST52G7&q=ssg1*&uid=ssg1S7000303&loc=en_US&cs Configuring supported storage system MPIO devices as the SAN boot device
A supported storage MPIO device can be used as the system boot device.
To configure the supported storage device boot device with the SDDPCM module:
1. Select one or more supported storage system devices as the boot device.
2. Install one of the following AIX operating systems on the selected supported storage devices.
If the selected supported storage device is ESS, the required operating system is AIX 5.2 TL06 ( or later) or AIX 5.3 TL02 (or later). If the selected supported storage device is DS6000, the required operating system is AIX 5.2 TL07 (or later) or AIX 5.3 TL03 (or later). If the selected supported storage device is DS8000, the required operating system is AIX 5.2 TL07 (or later), AIX 5.3 TL03 (or later), or AIX 6.1.
3. Restart the system. The supported storage boot device is configured as an MPIO device with AIX default PCM.
4. Install the supported storage device host attachment for SDDPCM and SDDPCM packages.
5. To release scsi-2 reserve on boot devices, issue the relbootrsv command. If you want to release non-rootvg scsi-2 reserves, provide the volume group name as a parameter. For example: relbootrsv vgname
6. Restart the system.All supported storage MPIO devices, including supported storage MPIO SAN boot devices, are now configured with SDDPCM.
Hope this helps.

Greetz from germany.
sorry I had to edit, I assume you will use SDDPCM and not SDD