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Selecting a diagnostic or maintenance function
The LTO-2 can run diagnostics, test write and read functions, test a suspect tape
cartridge, update its own firmware, and perform other diagnostic and maintenance
functions. The drive must be in maintenance mode to perform these functions. To
place the drive in maintenance mode and select a diagnostic or maintenance
function, see Table 5.
Attention: Maintenance functions cannot be performed concurrently with read or
write operations. While in maintenance mode, the tape drive does not accept SCSI
commands from the server.
Note: For best results, Function Codes 2-7 should be performed by IBM qualified
Table 5. Diagnostic and maintenance functions
Function Code 1 - Run SCSI Drive Diagnostics
Causes the tape drive to run self tests.
Attention: Insert only a scratch data cartridge for this test. Data on the cartridge 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 1 appears in the single-character display. If you cycle past 1,
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, 1 flashes,
the drive runs diagnostics for approximately 90 seconds, then C flashes. When C flashes, the drive is waiting for
a cartridge.
5. Within 60 seconds, insert a scratch data cartridge (or the tape drive exits maintenance mode). After you insert
the cartridge, 1 flashes:
v If the diagnostic completes successfully, it begins again and runs for a maximum of 10 times. Each loop takes
approximately 20 minutes to run. After the tenth loop, the diagnostic stops and automatically exits
maintenance mode. To halt the diagnostic, press the unload button within the first 20 minutes of the test (or
the diagnostic will run another 20 minutes). 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 diagnostic continues to the end of its loop and then stops. The tape drive then displays 0,
rewinds and unloads the cartridge, and exits maintenance mode.
v If the diagnostics fail, the status light flashes amber and an error code displays. The tape drive unloads the
tape cartridge and exits maintenance mode. To resolve the error, locate the code in Table 8 on page 49.
36
IBM 200/400GB LTO-2 Tape Drive: User's Guide
service persons. Otherwise, perform these codes only when instructed to do
so by IBM service or support.
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