A.  Create a filesystem with the mkfs command and list largefile
          support as one the options.

      B.  Use the fsadm command on a filesystem that already exists,

             fsadm -o largefiles /data      <---  /data is a mounted FS.

     Then set the ulimit to unlimited as in:

             ulimit -f unlimited
             defadm login ULIMIT=unlimited
             /etc/conf/bin/idtune -m SFSZLIM 0x7FFFFFFF
             /etc/conf/bin/idtune -m HFSZLIM 0x7FFFFFFF
             /etc/conf/bin/idbuild -B
             cd /
             shutdown -g0 -y -i6

    And it'd be done permanently for all users for /data.  You can do the
    same thing for / rather than /data, if you want largefile support on
    the root filesystem.  UnixWare or OpenServer has an sdighost -l command 
    that will list all your drives and their names.  Sometime people have 
    trouble with largefiles when they are not using the right device names 
    to start.

<mschalit@pacbell.net>
gerberb@zenez.com