AIX Version 4.3 Differences Guide

You must migrate or reorganize the volume group using migratepv or reorgvg to
free up enough physical partitions for the system to expand the VGDA/VGSA.
The importvg Command
The option -R restores the ownership, group ID, and permissions of the logical
volume special device files. These values will be restored only if they were set
using -U, -G, and -P flags of mklv or chlv commands. The -U, -G, and -P flags are
for root to define the ownership, group, and permissions of the LV you are
creating respectively. This flag is applicable only for big VG format volume
groups.
The mklv Command
If you create a logical volume in a big VG, you can use the following three new
options (using root privileges):
• Option -U specifies the user ID for logical volume special file
• Option -G specifies the group ID for the logical volume special file
• Option -P specifies the permissions (file modes) for the logical volume special
file.
The chlv Command
The three new options are the same with mklv command (using root privileges):
• Option -U specifies the user ID for logical volume special file
• Option -G specifies the group ID for the logical volume special file
• Option -P specifies the permissions (file modes) for the logical volume special
file.
Note
When using the above new options in mkvg, chvg, importvg, mklv, and chlv
commands, the commands must be entered from the command line. There are
no smit or wsm interfaces for them.
5.6.2.2 Header File Changes
The following header file was changed to support big VGs:
• lvmrec.h
5.6.2.3 Default Maximum PPs for Each Physical Volume - 1016
No matter if you create a big VG or small VG, the mkvg command will still be using
1016 as the default value for the number of physical partitions per physical
volume. If you use the -t (factor) option together with the big VG option, you can
create the volume group with the desired partition size and number of partitions.
The -t volume group factor was first introduced in AIX 4.3.1. See 5.5, “Physical
Partition Support (4.3.1)” on page 87 for reference. The number of physical
partitions calculated is 1016 * t factor per physical volume. The size for each of
the physical partition is up to 1024 MB.
The mkvg command, by default, creates a volume group that can accommodate
255 logical volumes and 32 physical volumes (disks). These limits can be
Logical Volume Manager Enhancements 91