AIX Version 4.3 Differences Guide

The relationship of factor -t, PP numbers per physical disk, and the number of
disks allowed in one VG is provided in Table 19.
Table 19. Factor -t
Factor t PP numbers Number of disks in VG
1 1016 32
2 2032 16
3 3048 10
4 4064 8
5 5080 6
6 6096 5
7 7112 4
8 8128 4
16 16256 2
Following is an example of a 4.3 GB disk. The PP size 8 MB is needed for
creating the volume group vg1 without the factor -t:
# lsvg vg1
VOLUME GROUP: vg1 VG IDENTIFIER:00091974e54218d7
VG STATE: active PP SIZE: 8 megabyte(s)
VG PERMISSION: read/write TOTAL PPs: 537 (4296 megabytes)
MAX LVs: 256 FREE PPs: 537 (4296 megabytes)
LVs: 0 USED PPs: 0 (0 megabytes)
OPEN LVs: 0 QUORUM: 2
TOTAL PVs: 1 VG DESCRIPTORS: 2
STALE PVs: 0 STALE PPs: 0
ACTIVE PVs: 1 AUTO ON: yes
MAX PPs per PV: 1016 MAX PVs: 32
When using the factor -t to create vg1, the PP size of 4 MB can be used. Then,
the maximum PPs per physical volume becomes 2032, and the maximum
physical volumes allowed in the volume group is 16. Following is an example:
# mkvg -t 2 -y vg1 hdisk4
0516-1193 mkvg: WARNING, once this operation is completed, volume group vg1
cannot be imported into AIX 430 or lower versions. Continue (y/n) ?
y
0516-631 mkvg: Warning, all data belonging to physical
volume hdisk4 will be destroyed.
mkvg: Do you wish to continue? y(es) n(o)? y
vg1
# lsvg vg1
VOLUME GROUP: vg1 VG IDENTIFIER: 00091974e54743e9
VG STATE: active PP SIZE: 4 megabyte(s)
VG PERMISSION: read/write TOTAL PPs: 1075 (4300 megabytes)
MAX LVs: 256 FREE PPs: 1075 (4300 megabytes)
LVs: 0 USED PPs: 0 (0 megabytes)
OPEN LVs: 0 QUORUM: 2
TOTAL PVs: 1 VG DESCRIPTORS: 2
STALE PVs: 0 STALE PPs: 0
86 AIX Version 4.3 Differences Guide