Wang 2200 - Chapter 1 General Information; Introduction

CHAPTER
1
GENERAL
INFORMATION
1.1
INTRODUCTION
The
Model
2280/2280N
series
of
Fixed/Removable
Disk
Drives is
specifically
designed
for
the
customer
who
has
large data
storage
requirements.
Each
of
the
Model
2280/2280N
series
of disk
drives
contains
approximately
13.4
megabytes
of
removable
storage
and
up
to 67.0
megabytes
of
fixed
storage,
depending
upon
the
model
designation.
Three
versions
of the
Model
2280/2280N are
available:
the
2280-1 (2280N-1)
,
the
2280-2 (2280N-2)
,
and
the
2280-3
(2280N-3)
,
with total
storage
capacities
of
approximately 26.8,
53.6,
and
80.4
megabytes
respectively.
To speed
processing
and
provide
extensive
error
correction,
the
disk
units
are
controlled
by
an
intelligent
Disk
Processing
Unit
(DPU)
which can
support
two
drives.
One
DPU
is
included
in
the
price
o£
a 2280
disk unit.
A
Model
2280N
disk
drive,
identical to
a
Model
2280
in all
other
respects,
is
shipped
without a
DPU
and
is
intended
for use
as
the
second
drive on a
DPU.
Up
to
three
2280 DPU's,
with a
maximum
of two
drives
each,
may
be
attached
to
a
2200
system
(the
2200T,
PCS-II,
PCS-III,
and WCS-15
excluded).
Figure
1-1.
Model
2280/2280N Disk
Drive