What is T-Factor?

The below post should give an idea about the T-Factor in IBM AIX Physical Volume.

According AIX Redbook, Its noted that a Physical Volume contains 1016 Physical Partitions (PP) and the default size of a Physical Partition is 4MB.

We come across the T-Factor Problem, When we try to extend a Volume Group with the new Physical Volume.

When your Volume Group cannot accommodate for any new PP by the process of extending a Volume Group with the Disk, the command will throw T-Factor Problem.

Solution:

# chvg -t # Vgname /* Command to Change the T-Factor to Increase Max No.of PP's in PV */

How it Works:

With the T-Factor of 2, the Max.No.of PP's in the VG get increase by ( T-Factor * 1016)

So , 2*1016 : 2032 Partitions. So, I am making my Volume Group to be flexible to accommodate  additional 1016 Partitions which is equivalent of 1 Physical Volume. But, Increasing the T-Factor, reduces the number of Physical Volumes that can be added to a Volume Group.