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4.Operation
Diagnostic and Normal Status Displays
4.3.4.
This chapter describes LED displays while the SDX-800V is starting up. When power is turned on, the SDX-800V will
go through its diagnostics to reach normal status. When a failure is detected during diagnostics, the LEDs show that
the SDX-800V is out of order and needs to be repaired.
Note: When power is turned on, the all LED on before the front panel test.
Diagnostic Status Display
4.3.4.1.
The SDX-800V starts with its Diagnostic function. This is made up of the Front Panel Test and the Kernel Test.
Front Panel Test
LED display sequence:
0.3sec
0.3sec
0.3sec
0.3sec
0.3sec
0.3sec
0.3sec
0.3sec
0.3sec
0.3sec
0.3sec
This function is for checking TAPE MOTION, CLEANING REQUEST and REPLACE TAPE LEDs and the related
circuits. No errors can be generated as this test is only for operator verification of indicator operation.
Kernel Test
After the Front Panel Test, the SDX-800V checks its internal units. When a Diagnostic error occurs, the SDX-800V
must be powered off. The SDX-800V will not work and should be checked or repaired immediately.
The purpose of the diagnostic firmware to test the SDX-800V 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 a hierarchical basis which Unit to designate as the Most Suspect
Failed Unit (MSFU). The confidence in this decision is intended to be 95%. For the details of Diagnostics, see clause
7.2.6
Normal Status Display
4.3.4.2.
After the Diagnostic Display, when no failures are detected, the SDX-800V is in the Normal Status. The LEDs show
various Normal Status (No Error) indications as shown in the table below:
4-4
TAPE
CLEANING
MOTION
REQUEST
on
on
-
-
on
on
-
-
on
-
-
on
-
-
on
-
-
on
-
-
on
-
REPLACE
TAPE
on
-
on
-
Front Panel Test
-
Kernel Test
-
on
-
-
on
-
SONY AIT-3Ex drive SDX-800V series Ver.1.0
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