Some historical notes:

   Support for >2GB raw logical volumes and JFS files
for server db, log, and storage volumes was first released
in ADSM V2 level 13.  It is present in all levels of version 3.
   On a migration install of AIX 4.2/4.3 from 4.1/3.2, symbolic
links were not updated to point to the AIX 4.2+ specific
versions of dsmfmt and dsmserv ( installed as dsmfmt.42
and dsmserv.42 ).  They would confinue to point to dsmfmt.41
and dsmserv.41.
  The 4.2+ executables use new APIs in
AIX  that require 64-bit operands to handle addressing of
files with offsets beyond 2GB.  New executables were
needed since the 4.2+ specific versions won't even load
in lower levels of AIX.

Barry Fruchtman
ADSM Development
bf AT us.ibm DOT com