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then:
v If an error is detected the test stops, 6 or 7 appears in the single-character
display (another code could appear), and the following message displays:
To determine the error, locate 6 or 7 in Table 8 on page 55. The drive unloads
the tape cartridge, exits maintenance mode, and displays the following
message:
To clear the error, turn the power off, then on again.
Function Code F: Fast Read/Write Test
Function Code F performs tests to ensure that the drive can read from and write to
tape. The diagnostic takes approximately 5 minutes to complete and loops
continually until you halt it. To halt the diagnostic, press the unload button. The
diagnostic will continue to the end of its loop, then stop. The drive then exits
maintenance mode. The Fast Read/Write Test performs fewer tests than the Run
Tape Drive Diagnostics test (Function Code 1).
Attention: For this test, insert only a scratch (blank) data cartridge or a
cartridge that may be overwritten. During the test, the drive overwrites the data
on the cartridge.
1. Make sure that no cartridge is in the drive.
2. Make sure that the following message appears on the message display (you
may need to turn the power off, then on again for the message to appear):
3. Within two seconds, press the unload button 3 times. The status light becomes
solid amber and the following message displays (indicating that the tape drive
is in maintenance mode):
Note: If a cartridge is in the tape drive, it will eject the first time that you press
the unload button and the drive will not be placed in maintenance
mode. To continue placing the drive in maintenance mode, perform the
preceding step.
4. Press the unload button once per second until F appears in the single-character
display and the following message displays. (If you cycle past the desired code,
press the unload button once per second until the code redisplays.)
Appendix B. Diagnostic and Maintenance Functions
77
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