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Running Library Verify Diagnostics
Figure 7-5. Library Verify diagnostics
Use Service Mode → Diagnostics → Library Verify to test the library and drive
hardware, communications, and the read/write capability of the library. Library
Verify is the most critical and most frequently used test, and should be executed after
all maintenance procedures to ensure correct library performance.
Note: Running the Library Verify diagnostic test will unload tape cartridges in the
To run library verification diagnostic tests:
1. Log into the Operator Panel.
2. Press the Down button to select Service Mode, and press Enter.
3. Press the Down button to select Diagnostics, and press Enter.
4. Select Library Verify, and press Enter. Follow the on-screen instructions.
5. When prompted, insert a scratch cartridge into the I/O Station.
6. Check the result of the test (PASSED or FAILED) reported on the Operator Panel.
7. Press any key and, when prompted, remove the cartridge used for this diagnostic
8. View the Error Log to check if any errors occur.
• View Accessor — Checks the accumulated operation count for: all
movements, Accessor movements, Picker movements, X movements, Y
movements, swivel movements.
• View Retry — Checks the accumulated number of retries (re-attempts to load
cartridges) in the drives and slots by the Accessor.
• View Error — Checks the accumulated number of errors for: Picker, X
movement, Y movement, swivel movement, load and unload operations for
each drive, and the power supply units.
• Clear Accessor — Resets the count.
• Clear Picker — Resets the count.
• Clear Retry — Resets the count.
• Clear Error — Resets the count.
Service Mode
Diagnostics
Library Verify
drives if the host application has not already done so.
The library performs a Power ON Self Test (POST), the normal test sequence
performed when the library is turned ON, to ensure that the library hardware is
functional. Then, the library tests communications with the tape drives over the
internal bus. If there is a cartridge in a drive, the library moves the cartridge to its
home slot, or to the I/O Station if the home slot is not known.
When the scratch cartridge is loaded, the bar code reader reads the bar code label
on the cartridge and stores it for later comparison. The cartridge is then moved to
the tape drive, where the drive runs its own write/read/verify test. The cartridge
is then moved to the second drive, if installed, and the test is repeated. When the
test is done, the library tells the drive to eject the cartridge, and then the cartridge
is moved back to the I/O Station. The bar code is read again and compared with
the value stored earlier.
from the I/O Station.
Chapter 7. Service Procedures
7-5
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