The consensus is yes you can upgrade from Solaris 2.3 to 2.5.1.  Thanks
for the warnings about having enough space in your partitions,
deinstalling disksuite, NIS+ of 2.3 incompatibility with NIS+ of 2.5.1,
etc.  Ofcourse a good backup before starting was recommended!!
Many thanks to all who responded, including:
    Steve Turgeon
    David S Foster
    Normand Ranger
    Dean Humphrey
    Viet Hoang
    Kevin Sheehan
    Marina Daniels
    Glenn Satchell
This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:11:49 CDT