IBM
3420
Tape Drive (cant'd)
Tape Thraads Successfully But Fails
to
Load in Columns
Check
for missing
BOT
marker,
or
incorrect leader
le.ngth
(distance from tape end
to
BOT
marker). Tapes with more than 3O-foot (9m) leaders may not load reliably.
If
neither condition
is
present, notify
CEo
.
Window
Fails
to
Open After Unload Operation
1. Open
access
door and manually wind remaining tape onto file reel.
2.
Close front door and press RESET and UNLOAD.
3. Notify
CEo
Channel Fails
to
Select Tape Unit (Device Switching
or
Two-Channel Switch Feature
Installed)
Check
that
toggle switches on the appropriate 3803 operator's panel are set
to
enable
selection
of
the
desired
tape control and tape unit. (Refer
to
Subsystem Description-
IBM
380313420
Magnetic
rape Subsystems, order number
GA32-{)()21,
for a descrip-
tion
of
switch functions.)
Page
5-38
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