Drive Diagnostics; Diagnostic Test; Power-On Self Test - Sony DDS-4 Product Description Manual

7. Diagnostics

7. DRIVE DIAGNOSTICS

This section deals with the diagnostics supported by the SDT-10000/SDT-11000. Each diagnostic is described in detail
and possible error codes are discussed.

7. 1 DIAGNOSTIC TEST

This section describes the Diagnostic Test facilities of the drive. The method for executing tests and receiving test
results from the Host is described and a full list of available tests and possible result messages is given.
Diagnostics can be initiated in several ways:
•

Power-on Self Test

• Send Diagnostic command initiating a Self Test
• Send Diagnostic command initiating a specific test or sequence
Each type of Diagnostics will be described in detail.
7. 1. 1 Power-on Self Test
Each time power is applied to the drive it will automatically perform a series of diagnostics on itself to insure that the
basic functions of the drive are performing properly. The power-on Self Test sequence is shown below:
Power supply voltage exceeds power-up threshold
60 Main Processor Microprocessor Test
61 Main Processor ROM checksum
62 Main Processor Destructive RAM Test
70 DDS Controller Register Test
The following 3 tests are initiated by the Mechanism Controller automatically after power-up and therefore would be
executing in parallel with the tests listed above.
20 Mechanism Controller Microprocessor Test
21 Mechanism Controller ROM checksum
22 Mechanism Controller Destructive RAM Test
80 Internal Message Bus Test
65 EEPROM checksum Test
30 Front Panel Check
72 Data Compression Controller Register Test
73 Data Compression Controller SRAM Test
79 DMA Line Test
71 Buffer RAM Test
If a failure occurs with any of the power-on diagnostic tests the drive will halt with the Status LED flashing.
If an error is detected during power-up, the drive will return CHECK CONDITION status to the host on the first
command received. The host shall issue a REQUEST SENSE command to determine the cause of the CHECK CON-
DITION status. The Sense data returned by the drive will have a Sense Key of 6 (Unit Attention) and the ASC/ASCQ
will be 29 80 (Drive failed power or test or diagnostic). The host can then issue a RECEIVE DIAGNOSTIC RESULT
command to the drive in order to identify the specific diagnostic test that failed and the failure error code.
The drive should be checked by a qualified person to determine what action should be taken.
SONY SDT-10000/SDT-11000 DDS Tape Drive 7 - 1