Installation guide

A-4 Storage Architecture Overview
A.2 DSSI and CI VMSclusters Compared
The Digital Storage System Interconnect (DSSI) bus is supported
on VAX 10000 systems using the KFMSA-BA adapter. It is a daisy-
chained multi-drop bus that connects up to eight nodes. Logically,
each DSSI bus is equivalent to a small CI, including the associated
logical Star Coupler. A CI storage unit and HSC is equivalent to a
DSSI ISE (see Figure A-2).
Figure A-2 CI and DSSI Compared
BXB-0070C-92
NI
Adapter
CI
Adapter
NI
Adapter
CI
Adapter
VAX
NI
Adapter
KFMSA
VAX
NI
Adapter
KFMSA
VAX
HSC
Tape/Disk Tape/Disk
CI
NI -- Ethernet
Tape/Disk
Controller
ISE
Tape/Disk
Controller
DSSI
CI Equivalent
of DSSI's ISE
ISE
DSSI
VAX