0516-1162 extendvg: Warning, The Physical Partition Size of 32 requires the creation of 1152 partitions for hdisk8

Complete error message : “0516-1162 extendvg: Warning, The Physical Partition Size of 32 requires the creation of 1152 partitions for hdisk8. The limitation for volume group datavg is 1016 physical partitions per physical volume. Use chvg command with -t option to attempt to change the maximum Physical Partitions per Physical volume for this volume group.
I encountered this error while trying to extend a VG using command “extendvg datavg hdisk8″
Reason : In a Normal VG, one PV can have maximum of 1016 PP ( To read more about VG in AIX go to the article Volume Group In AIX ) . Now here hdisk8 is large enough to have more then 1016 PP that is 1152 .
Solution : Here we need to increase the t factor of the VG ( To read more about factor value in AIX go to the article Volume Group In AIX ) . I have done it as below and it resolve the issue
Step 1 : I have change the t factor to 2 , now datavg VG can have max 16 PV with max 2032 PP each PV

root@webmanual: / # chvg -t 2 datavg 0516-1164 chvg: Volume group bbvg changed. With given characteristics datavg can include up to 16 physical volumes with 2032 physical partitions each.

If we change the factor value of the VG, then extendvg will be possible but it will reduce the PV per VG as below with each t factor increase
Step 2 : Extend the VG now

root@webmanual: / # extendvg datavg hdisk8

t factor Calculation:
Normal VG: 32/factor = new value of MAX PVs
Big VG: 128/factor= new value of MAX PVs
-t   PPs per PV        MAX PV (Normal)    MAX PV (Big)
1    1016                 32                         128
2    2032                 16                           64
3    3048                 10                           42
4    4064                  8                             32
5    5080                  6                            25
…n
“chvg -t” can be used online either increasing or decreasing the value of the factor.
 

* Article Source from : Internet