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4.Operation
Power-Fail or SCSI Reset Handling
4.3.3.
If there is a power-fail, the SDX-250V performs the following actions, and reverts to its default configuration:
(1) The drive remains positioned at the point where the power-fail or SCSI Reset occurred.
(2) It executes the Power-Up sequence of self-tests. (When power is restored.)
(3) If a tape is in the drive, the SDX-250V starts a LOAD sequence. The drive rewinds the tape to BOT and
remains on-line.
(4) The drive returns CHECK CONDITION status for the first command after the power-fail or Reset. The next
command from the initiator should be a REQUEST SENSE. The drive will return sense data including a sense
key that will indicate that the drive has been reset. (Sense Key / ASC / ASCQ = 06/29/00)
Diagnostic and Normal Status Displays
4.3.4.
This chapter describes LED displays while the SDX-250V is starting up. When power is turned on, the SDX-250V will
go through its diagnostics to reach normal status. When a failure is detected during diagnostics, the LEDs show that
the SDX-250V is out of order and needs to be repaired.
Diagnostic Status Display
4.3.4.1.
The SDX-250V starts with its Diagnostic function. This is made up of the Front Panel Test and the Kernel Test.
Front Panel Test
LED display sequence:
MOTION
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-250V checks its internal units. When a Diagnostic error occurs, all LED flash
fast. Then the SDX-250V must be powered off. The SDX-250V will not work and should be checked or repaired
immediately.
The purpose of the diagnostic firmware to test the SDX-250V 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%. For the details of Diagnostics,
see clause 7.2.6
4-4
TAPE
CLEANING
REQUEST
on
on
-
-
on
on
-
-
on
-
-
on
-
-
on
-
-
on
-
-
on
-
REPLACE
TAPE
on
-
on
-
Front Panel Test
-
-
on
-
-
on
-
SONY AIT-E Turbo drive SDX-250V series Ver.1.0
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