How to clear the PV id in AIX

When you assign a disk to a volume group,the disk automatically gets a PVID(Physical Volume ID).

For instance , the following example shows that hdisk2 has a PVID because it is a member in  hacmp_VG and hdisk1 has no PVID

because it is not a member in any VG:

# lspv

hdisk2          00f6c0100e3c830e      hacmp_VG    active
hdisk0          00f6c0105a881049      rootvg      active
hdisk1            none                 None

let`s remove hacmp_VG  and check the state of the PVID of hdisk2″

# reducevg hacmp_VG hdisk2
ldeletepv: Volume Group deleted since it contains no physical volumes.

# lsvg
rootvg

# lspv
hdisk2          00f6c0100e3c830e     None
hdisk0          00f6c0105a881049     rootvg          active
hdisk1            none               None

Now,we removed the hacmp_VG and hdisk2 still has the same PVID!

To remove the hdisk2 PVID:

#chdev -l hdisk2 -a pv=clear
hdisk2 changed

let`s check it again:

#lspv
hdisk2          none                   None
hdisk0          00f6c0105a881049       rootvg          active
hdisk1          none                   None

Now,we removed hdisk2 PVID.