Technical information
2.2 Mass Storage Options
The
VAX
4000 Model 300
system
supports
the
following
mass
storage
devices:
•
Internal
to
the
BA440 enclosure:
TK70
tape
drive
RF -series
integrated
storage
assembly
(lSA)
•
External
to
the
BA440 enclosure:
RRD40 compact
disk
subsystem
(tabletop)
TU81-Plus
tape
TSV05
tape
RA-series disks
Four
RF-series drives
are
supported
by
one KDA50 controller.
The
system
supports
up
to eight
RF
-series drives,
with
two KDA50 controllers.
Up to four RF-series ISAs can
be
installed
in
your
system.
The
CPU
communicates
with
the
ISAs
through
a Digital
Storage
System
Interconnect
(DSSI) adapter, which
is
built
into
the
CPU. Your
VAX
4000
system
has
two
DSSI
adapters,
and
hence, two
separate
DSSI busses.
Each
DSSI
bus
is
capable of
supporting
seven
integrated
storage assemblies.
You
can
put
only two
disk
controllers
in
the
Q-bus backplane, two KDA50s,
two KFQSAs,
or
one
of
each.
Option Specifications
2-3