yes, you need to install ODM. Search powerlink for document "EMC Host Connectivity Guide for IBM AIX"

As dynamox suggested you need the regular ODM sets for AIX.

Really from a SAN perspective there is nothing different you do for a VIO server that you would not do for a regular AIX host. The only consideration is making sure you have the correct patch levels/firmware in place to meet the microcode level on your storage array.

These steps may help...

1-stage EMC powerPath and ODM definition files in "padmin" home (EMCpower.dare_install, EMC.AIX.5.3.0.2_ODM)
2-create VIO backup (backupvios)
3-document all hdisks, hdiskpower, and Virtual Target Devices(lspv, /usr/ios/cli/ioscli lsmap -all)
4-create clone of aixvio01 profile with NO fiber HBA's (done so that disks will not be "connected at startup")
5-power off aixvio01 profile
6-client lpars will now have disk and network only from aixvio02 - one path active one path failed
7-Activate new vio01_no_hba profile
8-Stop Navisphere (Navi_agent) on aixvio01
9- remove all Virtual target Devices to client lpars (rmvdev)
10-remove all "hdiskpower" devices (rmdev hdiskpower3)
11-remove all corresponding hdisks (rmdev hdisk2 - hdisk233)
12-update PowerPath from ver. 5.1 to 5.3 (installp on EMCpower.dare_install, EMC.AIX.5.3.0.2_ODM)
13- remove definitions of the fiber adapters (rmdev ¿dl hba# -R)
14-reboot vio01_no_hba lpar profile
15-check version of EMC PowerPath (lslpp -L|grep -i emc)
16-power off vio01_no_hba profile
17-activate standard aixvio01 profile
18-233 hdisks should be present and 57 hdiskpower EMC disks should be in place
19-ensure that scsi reserve is set to "no" (chdev -l $HSK -a reserve_lock=no) (reserve_lock no Reserve device on open)
20-ensure that hdiskpower devices have PVIDs (chdev -l $HSK -a pv=yes)
21-double check that PVIDs of hdiskpower devices are the same as before
22-remap Virtual target Devices to client lpars (mkvdev -vdev hdiskpower7 -vadapter vhost6 -dev oratst01hd0)
23-client lpars will now have disk and failover network from both aixvio01 and aixvio02 - (Enabled hdisk7 vscsi0 Enabled hdisk7 vscsi1)

Hi all ,

i have two servers , each with 3 lpars,3 HBAs, Powerpath should be installed on each lpar ?

Hi.  PowerPath is licensed by CPU not by LPAR.  Are all the system's LPARs using all available CPUs?

Thanks, Brion