IBM 3420
Tape
Drive
Source: 8232-0003-2 IBM 3420 Operator's Guide
6A32-0020 IBM 3803 3420 Magnetic
Tape
Subsystem
Component Description
CLEANING PROCEDURE
Refer to
Tape
Unit
Cleaning Procedure, order number GY32-5034-0_
OPERATING
PROCEDURES AFTER FAILURE
Tape Fails
to
Thread (With Cartridge)
1_
Remove
reel
and cartridge.
2.
Ensure tape end
is
undamaged and hangs free
in
cartridge (if necessary, trim
end with
cutter, part 2512063).
3. Check that unlatching cartridge toggle opens tape
port
4. Remount
reel
and cartridge and retry load procedure.
5.
If failure recurs, remove
reel
from cartridge and
try
load procedure without
cartridge.
Tape
Fails
to
Thread (Without Cartridge)
1.
Ensure tape end
is
undamaged and positioned
in
threading chute (if neces-
sary, trim end with cutter, part 2512063).
2.
Open doors and clear any obstructions from tape path.
3.
Close doors and retry load procedure. I f unit still fails, notify
CEo
End
of
Tape Comes Off Machine
Reel
Hub
as
Tape Loads
in
Columns
Check leader length
(distance from tape end
to
BOT
marker). Tapes with less than
10-foot (3m) leaders may not load reliably.
'To
recover information from tape with
short
leader, attach additional temporary leader with clear cellophane tape.
NOTE: After information
is
recovered (reproduced
on
another tape reel), recondition
source
reel
by cutting off old leader and
BOT
marker. Trim end with cutter, and
apply new
BOT
marker about 15 feet (4,6m) from leading end.
Have
marker parallel
to
and about 1/32 inch
(O,B
mm)
from front edge
of
tape. Marker must
not
be
wrin
kled nor extended beyond tape edge.
Tape Unit Fails
to
Sense
EOT Marker (Tape
End
Comes
Off
File Reel)
Verify presence
of
EOT
marker approximately 25 feet (7,6m) from end
of
tape. If
marker is' present, malfunction could be program error
or
machine failure-notify
CE_
1_
Rewind Procedure-With Cartridge:
Open front door and manually wind remaining tape on machine reel.
Close
front door and press RESET and UNLOAD. When cartridge closes,
remove cartridge and
reel
and mount an empty
reel
on machine_
b.
Open doors, manually thread tape from machine
reel
through tape path,
and wind approximately ten turns of tape on file reel. Close doors and
press
LOAD/REWIND.
Unload
tape unit and return
reel
to
cartridge when rewinding
is
complete.
2. Rewind Procedure-Without Cartridge:
Do
(b)
above. Unload tape unit when rewinding
is
complete.
Pagt5-37
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