AIX Version 4.3 Differences Guide

• The volume group's disks must be unlocked on all systems that have the
volume group varied on and operational. Volume groups, and their disks, may
be unlocked, remain active, and used through the varyonvg -b -u command.
• If an active node has both added and deleted logical volumes on the volume
group, the -L flag may produce inconsistent results. The -L flag should be
used after each addition or deletion rather than being deferred until after a
sequence of changes.
Figure 10 shows an example of a multi-tailed system.
node: mickey
hdisk3
sharevg
node: goofy
Figure 10. Importvg -L Example
There are two machines, goofy and mickey, that share one disk. The volume
group sharevg is created on the shared disk. Both goofy and mickey are aware of
the sharevg volume group. The sharevg in node mickey is varied on and in node
goofy, it is varied off.
On node mickey, to make the sharevg unlocked, enter:
#varyonvg -b -u sharevg
On node goofy, to read the LVM information made by node mickey, enter:
# importvg -L sharvg datavg hdisk3
On node mickey, to return to the normal mode and release the lock, enter:
# varyonvg sharevg
It should be noted that the volume group sharevg remained on line during the
entire operation, therefore, not affecting production work.
5.3 importvg Fast Mode
A new option -F has been added to importvg command. The command syntax is
shown in the following example.
importvg [-V MajorNumber] [-y VolumeGroup] [-f] [-c] [-x] | [-L VolumeGroup] [
-n] [-F] PhysicalVolume
84 AIX Version 4.3 Differences Guide