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(B) If SCSI bus reset causes the drive to reset then the problem is with the SCSI bus addressing or termination.
- Check that the SCSI bus ID jumper is set for the proper address (see clause 3.1.1)
- Check SCSI bus termination. The two SCSI devices at the ends of the bus should be terminated. No other
units should have terminators installed
Note: The strength of the SCSI bus signals can be affected if too many terminators are installed (Signal drivers can
be damaged as well)
Read/Write Problems
4.5.2.2.
To prevent read/write errors, follow the cleaning recommendation in clause 4.5.1 If a read/write error occurs, a
combination of the following steps should correct the problem.
- Remove the tape.
- Clean the drive with the AIT cleaning cartridge.
- Load a new tape in the drive.
- Retry the operation.
Note: If these steps do not correct the problem the drive may be defective and should be returned to Sony for
service.
Replace Tape
4.5.2.3.
When Media Error occur drive will indicate that tape is bad by turning on the Replace Tape LED. If this condition
occurs, a combination of the following steps should correct the problem.
- Remove the tape.
- Clean the drive with the AIT cleaning cartridge.
- Load a new tape in the drive.
- Retry the operation.
Note: If these steps do not correct the problem the drive may be defective and should be returned to Sony for
service.
4.5.2.4.
Media Warning
When a Media Warning threshold is exceeded the drive will indicate that the tape is bad by flashing the Replace
Tape LED MEW(Media Warning) bit is 1. The indicator will be on for 0.9 seconds, off for 0.3 seconds. The Tape
Motion and Cleaning Request LEDs will operate normally. If this occurs, the data on the cassette should be copied
onto a new one and the old cassette discarded. This status is cleared by unloading the cassette. The Media Warning
is displayed if any of the following conditions are met:
- More than 1,024 RAW retry per 1,024 groups written
- More than 11 read retry or 11 C3 ECC, third level Error Correction Code, per 1,000 groups read
Note: Media warning is calculated as an average value of 1024 groups of data (either Read of Write) 1024 Groups of
data is approximately 1.2 Gbyte.
Clearance for Service
4.5.3.
All servicing is performed only after removal of the SDX-250V from is mounting. It is recommended that in mounting
the drive into a chassis provisions should be made to allow easy access to the mounting screws (see Figure 2-2).
Packaging for Return to Sony
4.5.4.
The drive should be returned in its original packaging. Sony will not take responsibility for shipping damage caused
to an improperly packaged drive.
SONY AIT-E Turbo drive SDX-250V series Ver.1.0
4.Operation
4-9
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