HP 3PAR AIX and IBM Virtual I/O Server Implementation Guide

NOTE: When TPVVs are grown and are exported to VIO servers it is important to wait for a
period of time before attempting to grow the AIX LPAR volume groups. In this case a one minute
wait period was used. Wait time can vary depending on many factors on the VIOS; however, HP
testing has shown two minutes is typically adequate.
When growing a virtual volume that is exported to an LPAR served by VIO servers, it is advisable
to stop any I/O in progress to the volume group being grown or I/O stalls may be seen. An I/O
stall is defined as a period of time where no I/O will occur to the virtual volume being grown.
Following a wait as noted above, the volumes groups can be changed on the AIX LPAR indicating
the new size:
# chvg -g volume1
0516-1712 chvg: Volume group volume1 changed. volume1 can include up to 1024 physical volumes with 262144 total physical
partitions in the volume group.
# chvg -g volume2
0516-1712 chvg: Volume group volume2 changed. volume2 can include up to 1024 physical volumes with 524288 total physical
partitions in the volume group.
The new hdisk sizes can be viewed using the bootinfo –s command, or the lspv command
can be used to display the new volume group sizes:
36 Allocating Storage for Access by the AIX or IBM Virtual I/O Server Host