IBM 4331 Mainframe - test-drb@ccmp.vtda.org

2 May 2017

...
  The 4361 is the real gem to get in this type of
system.  There is a
 builtin storage director as well as the 4 port comm controller. 
The 4331 had an option for an integrated storage director, as well as a
feature that converted between CKD and FBA for use with 3340 drives. The
system Guy owns only needs the 3340 A2 and B2 drives cabled together and to
the integrated director.

Carl