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1600: This light comes on when a tape that has been recorded at 1600 bits per
inch (bpi) is loaded. It goes off when the tape is unloaded.
6250: This light comes on when a tape that has been recorded at 6250 bits per
inch (bpi) is loaded. It goes off when the tape is unloaded.
Note: When a blank tape is loaded, neither the 1600 nor the 6250 light comes on.
When a tape is written with a density that is unknown (neither 1600 nor 6250),
both lights come on.
Busy: This is on when the tape unit is reading, writing, or anytime you press the
Online button while the system is completing an operation.
File Protected: This light comes on when a tape that does not have a write-
enable ring on it is loaded into the tape unit. It goes off when the tape is
removed from the tape unit. It remains off when a tape reel that contains a write-
enable ring is loaded.
Check: This light flashes when there have been too many read or write errors
(the head needs cleaning or the tape is bad). The Check light comes on if a load
failure or device error occurs.
Note: Do not wait for this light to come on before cleaning the tape unit. See
"Cleaning Recommendations" on page 4-1.
Tape Movement Lights: These five lights show how much tape has moved from
the supply reel to the take-up reel (loading) or from the take-up reel t o the supply
reel (rewinding). While the tape is loading, the light on the extreme left will
flash. When the tape is loaded, the light on the extreme left will come on and
stay on. The other lights come on when the tape has moved 20%,
40%,
70%,
and
onto the take-up reel. Only one light is on at a time. When the tape is
unloading, one light at a time flashes t o indicate the position of the tape. When
the tape is unloaded, all the lights are off.
Status Display
This area is used t o supply operating information to the operator. It is also used by
the service representative to show the options and test results when performing
diagnostics.
The format of the status code is
xx-zzzz,
where:
xx is the percentage of the tape on the take-up reel.
-
indicates that the tape unit is communicating with the system.
zzzz is the status code indicating the current state of the tape unit.
Diagnostic Mode
The tape unit can be put into diagnostic mode after being powered on by using the
following procedure:
1. If the Online light is on, press the Online button to take the tape unit offline.
2. Press the Diagnostic Mode button. TEST
*
is displayed t o show that the tape unit
is in the diagnostic mode.
3. Press the Diagnostic Select button t o select the option you want. Four options
are available: TEST
*,
CONF
*,
INFO
*,
or ID
*.
Appendix A. Control Panel Operations
A-3
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