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Table 5. Diagnostic and maintenance functions (continued)
Function Code F - Fast Read/Write Test
Causes the tape drive to perform tests to ensure that the drive can read from and write to tape. This diagnostic
performs fewer tests than the Run Tape Drive Diagnostics test (Function Code 1). The tape drive takes
approximately three minutes to run the test. The Fast Read/Write Test is not as comprehensive a test and is not
recommended for isolating errors between the drive and the media.
Attention: Data on the suspect tape will be overwritten.
1. Make sure that no cartridge is in the drive.
2. Within a 1.5-second interval, press the unload button three times. The status light becomes solid amber, which
means that the drive is in maintenance mode.
3. Press the unload button once per 1.5 seconds until F appears in the single-character display. If you cycle past F,
continue to press the unload button until it redisplays.
4. To select the function, press and hold the unload button for 3 seconds. After you select the function, C flashes.
When C flashes, the drive is waiting for a cartridge. Within 60 seconds, insert the suspect data cartridge (or the
tape drive exits maintenance mode). After you insert the cartridge, F flashes and the test begins.
v If no error is detected, the test begins again and runs for a maximum of 10 times. Each loop takes
approximately 3 minutes to run. After the tenth loop, the test stops and the drive automatically exits
maintenance mode. To halt the test, press the unload button. The drive acknowledges the request by slowing
the length of time that the currently displayed character flashes on the single-character display (from twice
per second to once per second). The test continues to the end of its loop and then stops. The tape drive then
rewinds and unloads the cartridge, displays 0, and exits maintenance mode.
v If an error is detected, the tape drive displays an error code, unloads the tape cartridge, and exits maintenance
mode. To resolve the error, locate the code in Table 8 on page 49.
Function Code H - Test Head
Causes the tape drive to perform the Head Resistance Measurements test and a Write/Read test (on the center of
the tape). The drive runs these tests to ensure that the tape drive's head and tape-carriage mechanics are working
correctly. The tape drive takes approximately 10 minutes to run the test.
1. Make sure that no cartridge is in the drive.
2. Within a 1.5-second interval, press the unload button three times. The status light becomes solid amber, which
means that the drive is in maintenance mode.
3. Press the unload button once per 1.5 seconds until H appears in the single-character display. If you cycle past H,
continue to press the unload button until it redisplays.
4. To select the function, press and hold the unload button for 3 seconds. After you select the function, C flashes.
When C flashes, the drive is waiting for a cartridge. Within 60 seconds, insert a scratch data cartridge (or the
tape drive exits maintenance mode). After you insert the cartridge, H flashes and the test begins:
v If no error is detected, the test begins again and runs for a maximum of 10 times. Each loop takes
approximately 10 minutes to run. After the tenth loop, the test stops and the drive automatically exits
maintenance mode. To halt the test, press the unload button. The drive acknowledges the request by slowing
the length of time that the currently displayed character flashes on the single-character display (from twice
per second to once per second). The test continues to the end of its loop and then stops. The tape drive then
rewinds and unloads the cartridge, displays 0, and exits maintenance mode.
v If an error is detected, the tape drive displays 5, unloads the tape cartridge, and exits maintenance mode. To
resolve the error, locate 5 in Table 8 on page 49.
Chapter 4. Operating the tape drive
43
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