A fellow SA is claiming that IBM limits the VG size to 1TB when using
the 32bit kernel on AIX 5.3. I was running the 32bit kernel with a 2TB
VG and had no problems. Was this an anomaly for me? Is there any
documentation on this issue? Thank you in advance.

I believe your fellow SA may be mixing up the VG and the file system
maximum sizes. Consider this note from IBM's website documentation:
http://publib16.boulder.ibm.com/doc_...c/fs_types.htm

"The maximum file size and maximum file system size is limited to 1 TB
when used with the 32-bit kernel. "


Check out the scalable volume groups information in the IBM Redbook on
AIX 5.3 Differences:
http://www.redbooks.ibm.com/redbooks...tml/wwhelp.htm

The discussion focuses mainly on the maximum number of PVs per volume
group, the maximum number of PPs per PV, and the size of each PP. In my
opinion based on what I read, it is not related to the 32-bit vs 64-bit
at that point.

Unfortunately I don't have enough disks to prove the point, but I
believe based on the documentation that you should be able to make a 32
TB volume group in AIX 4.3.2 or higher (in 32 or 64 bit). That is based
on maximum 32 PVs X 1 GB PP size X 1016 max partitions per PV.

Anyone out there have a really large VG? Would they like to show off
their lspv stats for it so we can drool over it? ;-)

Steve