Need of PVID, UDID and IEEE

To export a physical volume as a virtual device, the physical volume must have an IEEE volume attribute, a unique identifier (UDID), or a physical identifier (PV ID).

Physical Volume Identifiers

A physical volume in an AIX Box (hdisk#) could be identified with Physical Volume ID, UDID (Unique Device Identifier), IEEE Identifier.

PVID : 32 Digit Identified on which the first 16 Digit remains the same on all the Physical Volumes and the remaining 16 Digit vary among the physical volumes.

UDID : This is value that is assigned to the physical volumes that are managed by MPIO.

$ chdev -dev hdisk# -verbose : Command to view the PVID, UDID and IEEE ID for a physical volume.

# lsattr -EHl hdisk# : Command to view the PVID and UDID for a disk.

$ chkdev -dev hdisk1 -verbose

NAME:                hdisk1
IDENTIFIER:          210ChpO-c4HkKBc904N37006NETAPPfcpPHYS2VIRT_CAPABLE:   YES
VIRT2NPIV_CAPABLE:   NA
VIRT2PHYS_CAPABLE:   NAPVID:                00c58e40599f2f900000000000000000
UDID:                2708ECVBZ1SC10IC35L146UCDY10-003IBXscsi
IEEE:
VTD:PHYS2VIRT_CAPABLE:  Shows that the resource could be virtualized.
VIRT2NPIV_CAPABLE:  Shows that the resource is N-Port Virtualization supportive.
VIRT2PHYS_CAPABLE :  Shows the resource could be used as a physical object.