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Maintenance
The diagnostic routines test the functions of the drive and report the results to the operator or
service representative. Error details are available to isolate error conditions between the
media and drive. The routines are:
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Power-on self test.
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Maintenance mode tests, such as a Tape Write/Read test.
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Isolation diagnostics to isolate between media and hardware when an error occurs.
The power-on self test (POST) is executed automatically. The Maintenance mode test routines
isolate errors during operation and at drive installation. Isolation diagnostics isolate errors
during operation in addition to the diagnostic routines provided by the drive, host diagnostics
can be executed to exercise various functions of the drive.
Topics in Maintenance:
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Reliability, Availability, and Serviceability (RAS)
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Power-On Self Test (POST)
The drive performs the following self tests upon application of power to the drive:
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Memory tests
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Module tests
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Data channel test
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Servo channel test
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A subset of Sensor Tests
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Motor tests
Power-on self test performs a functional test of the drive. It initializes the microprocessor
working memory, the external Interface chips, and the drive electronics. If media is not
present at power-on, the entire POST sequence is executed.