Once a physical disk has been added into an AIX system, it has to be imported into AIX so it can be utilized. This is done by running the command cfgmgr. If you have many PVs already, you may wish to get a temporary dump of them first, then run cfgmgr and finally run a dump of PVs against diff to see what drive(s) has been added.
lspv > /tmp/lspv.old
cfgmgr -v
lspv > /tmp/lspv.new
diff /tmp/lspv.old /tmp/lspv.new
This new PV can be added into an existing Volume Group (VG) or added to a new VG. NOTE: If you add a PV to a VG, and later decide to remove it and add it into a new VG, the PVID has to be wiped from the drive first. chdev -l hdiskx -a pv=clear.
= Add to existing Volume Group =
First you would want to list all of your VGs with the lsvg command. For this example, I’ll use rootvg and the newly added disk is hdisk5. Hence I would run the following command:
extendvg rootvg hdisk5
Once the drive has been added to a VG you can run the command bootinfo -s hdisk5 to get the size of the drive.