I would like to know if an NW6.5 NSS pool made up of several segments can
be reduced in size without having to delete and recreate. Recently an NSS
pool was expanded by an incorrect amount of space, but the volume has not
been modified.

The NSS pool is made up of three seperate partions as follows:
segment 0 125Gb
segment 1 50Gb
segment 2 150Gb

The NSS pool contains a single volume and the volume only uses the first
two segments, hence volume size is 125Gb+50Gb=175Gb. The option has NOT
been set to allow the volume to grow to the size of the pool, volume size
is limited to 175Gb. I would like to reclaim the 150Gb from segmemt 3 if
this is possiable, but unlikely.