I am using DS4800 storage. After allocation 5 LUN from the storage i run cfgmgr in server. I am getting below error and disks are also not showing while runnig lspv command.
Please anyone helpe me to solve this issue.

Method error (/etc/methods/cfgfdar -l dar0 ):
0514-002 Cannot initialize the ODM.

Is that the FULL error message, or just the first line?? Usually, cfgmgr errors are longer, and will have device names in them. Most importantly, you're using AIX, on IBM hardware...what did IBM support say?

yes this is the full error message.Some suggested to reboot the server and some suggested to recreate the dac and dar. I dont know how to recreate the dac and dar devices.

Honestly, the DS4800 device can be a bear to configure. Calling IBM is your best bet.

Otherwise, just running cfgmgr *SHOULD* recreate your DAC devices, but the DS4800 is not a true MPIO array. You have to go into the array firmware and define things, such as the primary path for each LUN. Then, check the attributes on the devices ("lsattr -El hdisk#"). Other than the queue depth, there won't be much to chdev, after a reboot.

Some helpful commands:
You can also try these steps:

• umount all SAN-Filesystems
• exportvg all SAN-VG
• rmdev all 4800-hdisks
• rmdev all dar-devices
• rmdev -Rdl all fcs-Adapter
• cfgmgr

But again, know what you're doing first, and I'd STRONGLY suggest contacting IBM.

Thanks for you reply. IBM also suggested the same.