Ref: 11640070
Title: ADSI Controller Used in Older External Backup Units
Date: 4/9/90

Copyright 3Com Corporation, 1991.  All rights reserved.

Some 3Server tape backup units shipped in early 1985 use an ADSI
controller board.  This controller must use version 1.2.1 or
earlier of the TDRIVE.SYS file.  It cannot use later versions.

To find out if you have an ADSI controller, look at the tape unit
serial number.  If the serial number is less than 913, the tape
unit has an ADSI controller.  If the serial number is between 913
and 1000, it MAY have an ADSI controller.  To confirm it, remove
the cover and look at the chips on the controller board.  If the
chips are laid out from right to left rather than front to rear,
the unit has an ADSI controller.  (The front is where the tape
slides in; the rear of the tape is where the SCSI cable plugs
in.)

