206
User's
Handbook to the Atari 400/ 800 Computers
million
bytes. The hard disk
it
se
lf
is
made
of
a rigid material
with
a magnetic coating. The disk
drive
and the hard disk are separate
units. The
operator
can
remove
one
hard disk and replace
it
with
another.
Winchester Disk Drives
Winchester disk drives are designed
so
that
from
6
to
10 times
more
data can be stored on
their
surface than on a standard
floppy
diskette. Winchester disks must be
kept
very clean
as
they
are
extremely
vulnerable
to
dust,
dirt,
and smoke.
Since
they
mu
st
be kept
so
clean, Winchester disks must be
sealed inside
of
the disk drive. This means that Winchester disks
cannot
be changed.
Since Winchester disks
cannot
be removed,
floppy
disk systems
often
are used in
conju
ncti
on
with Wi nchester disks
to
allow
for
back-up
storage. Winchester disk systems are genera
lly
used
with
microcomputers
rather
than
ha rd
disk
systems. A
Winchester
drive
is
s
ho
wn in Illustrat
ion
7-1.
Illustration 7-1. Winchester Disk System
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