Installation guide

3.3 DSSI and CI VAXclusters Compared
The Digital Storage System Interconnect (DSSI) bus is
supported on VAX 6000 systems using the KFMSA 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 3–3).
Figure 3–3: CI and DSSI Compared
msb-0748-91
NI
Adapter
CI
Adapter
VAX
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
3–6 VAX 6000 Series Installation Guide