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Operation
operating
status
of the
power
supply.
The Power
indicator
will
be illuminated
if
all
dc operating
voltages
are
present.
The
loss
of
any
dc
operating
voltage
will
cause
the
LED
to
extinguish.
3-18.
TAPE CARTRIDGE
INFORMATION
3-19.
TAPE CARTRIDGE
DESCRIPTION
The
cartridge
is
a
DC
600
type
preformatted
data
cartridge.
Two
sizes
are
available:
the
67.
Mbyte
cartridge
with
600
feet of tape,
and
the
16.7
Mbyte
cartridge
with 150
feet of tape.
Each
formatted block
includes space for
1
kbyte
of
data
with
error correction, block
addresses,
and
error detection.
Figure
3-2
illustrates
the
tape
cartridge
formats.
A
mechanical
write
protect
key
is
built into
the cartridge
also.
Before
a
tape
cartridge
can
be
used
in
host -initiated
data
operations,
it
must
be
certified.
The
certification
routine,
which
is
initiated
by
the
host,
takes
approximately
17
minutes
for a
150-foot
tape
and
approximately
67 minutes
for
a
600-foot
tape.
Tapes
are
available that
have
already
been
certified;
these
tapes are
ready
for
immediate
use.
3-20.
TAPE CARTRIDGE LOADING
To
load the tape cartridge into the tape
unit,
proceed
as
follows
(see
figure
3-1
for tape unit
controls):
a.
Remove
the tape cartridge
from
the
plastic
case.
b.
Set
the
tape
cartridge
safe
screw
(see
figure
3-3)
to
the desired
position.
This
screw
is
used
to
protect the
data
stored
on
the
cartridge.
When
the
arrow
points
to
SAFE,
information cannot be written
on
to
the tape
cartridge.
When
the
arrow
is
in
the
opposite direction
from SAFE,
the tape
can
be
written
on
with
the
possible
loss
of
previously
stored data.
If
a
tape cartridge
set
to
SAFE
is
installed in
the tape
drive,
the
WRITE PROTECT LIGHT
will illuminate.
I
1
65407
|
65406
1
61321
61320
BOT
"L"
CARTRIDGE
EOT
1
1
8176
|
8177
1
1
1
1
1
1
1
8175
1
8174
1
4089
4088
1
1
0
|
1
|
4086
4087
1
.
USER SPACE
l
"
"
\
(INCLUDING SPARES)
SPARE TABLE
ERROR LOGS
&
DIAG.
BLOCKS
1
1
USE
LOGS
1
1
16351
1
16350
1
15331
15330
BOT
"S"
CARTRIDGE
EOT
|
I
2044
|
2045
1
1
1
2043
1
2042
1
1023
1022
1
l
l
1
1020
1021
15
T
R
A
C
K
#
2
1
0
T
Ft
A
C
K
#
2
1
0
Figure 3-2.
Tape
Cartridge
Formats
3-5
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