Radio Shack TRS-80 Hardware Manual page 16

Wrile-Protect Switch.
When
the switch
is
lighted,
the disk drive
is
write
protected
so
that
you cannot
write Information
on
it.
Pressing
the switch turns the write protection
on and
off.
Press
this
switch onty
when
the drive
is
not
in
use-
Otherwise, you
may
lose
or
destroy
data.
Warning: Never
move
yuur hard disk drive while the
tlr
ive
is
run-
ning.
Doing so
may
cause permanent
damage
to
the drive or
disk.
Also,
do
not
»xposR a
hard
disk
to
a strong mngnfitie
fisM,
fiiinh
as
Ihat
produced by a
bulk eraser
You
could lose
valuable data
or
damage
the
unit.
Remember,
you cannot
bulk
erase
a
hard
disk.
Power-Up Procedure
1.
Be
sure
all
Uoppy
diskette drives
are empty, Turn
on
all
peripheral
equipment
(such as
a
printer
or external floppy
diskette drives).
2.
Turn
on
all
hard
disk drives by
turning the
power
key,
which
is
locked on
i
tie
primary hard
disk drive,
Clockwise.
Wan
fui
all
secondary
drive
power
lights to
come
on
before continu-
ing
Then remove
the key
3.
Turn
on
the
computer.
Power-Down
Procedure
1.
The
operating
oyntcm
prompt
should
bo
the
last line
on
your
screen.
II it
is
not,
press ("Entefo or
exil
your
program
so that
the
prompt
appears.
2.
Remove
all
floppy diskettes from
their drives,
a
turn
orr
any peripheral equipment.
4.
Turn
off
all
hard disk drives by turning the
power
key
counterclockwise.
5.
Turn
oft
the computer.
10