Sony DDS-4, Руководство по описанию продукции, Страница: 30 / 177

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SONY SDT-10000/SDT-11000 DDS Tape Drive
4. OPERATION
4. 3. 4. 1. 1 Front Panel Test
LED display sequence:
0.25 sec
0.25 sec
0.25 sec
0.25 sec
0.25 sec
0.25 sec
0.25 sec
0.25 sec
0.25 sec
0.25 sec
0.25 sec
0.25 sec
0.25 sec
Busy
on
-
on
-
on
-
-
on
-
-
on
-
-
Tape
on
-
on
-
-
on
-
-
on
-
-
on
-
Status
on
-
on
-
-
-
on
-
-
on
-
-
on
repeat until end of
Power On Diagnostic
Front Panel
Test
Note: This function is for checking BUSY, STATUS and TAPE LEDs and the related circuits. No errors can be gener-
ated as this test is only for operator verification of indicator operation.
4. 3. 4. 1. 2 Kernel Test
After the Front Panel Test, the SDT-10000/SDT-11000 checks its internal units.
Note: If a failure is detected, the SDT-10000/SDT-11000 displays the Failed Unit. Refer to section 4. 3. 4.
When a Diagnostic error occurs, the SDT-10000/SDT-11000 must be powered off. The SDT-10000/SDT-11000 will
not work and should be checked or repaired immediately.
Note: The purpose of the diagnostic firmware is to test the SDT-10000/SDT-11000 electronics for functionality. If the
diagnostic request comes from the host through SCSI, then the results are reported through SCSI.
If the electronics are not functioning, the diagnostic firmware tries to isolate the non-functional area to a specific Failed
Unit. Given a failure, the firmware decides on an hierarchical basis which Unit to designate as the Most Suspect Failed
Unit (MSFU). The confidence in this decision is intended to be 95%. The MSFU is identified and displayed on the front
panel as shown above section 4. 3. 4. For the details of Diagnostics, see section 7.