Seagate Diagnostic Commands Upon po

Seagate Diagnostic Commands

Upon power up, the drive will respond to a set of diagnostic command send through serial port. Because of the number of commands supported, the commands are broken up into ‘Levels’. Many, the progress may be sent over the serial port for number of bits written and read, and command such as read, write, seek, and error log manipulation are available at several different levels. Diagnostic commands are used in place of ATI scripts to do testing. While the drive is running these diagnostic commandshard/soft error rates, a number indicating the test currently being performed, and various information for status of the current test.
The firmware consists of 2 flash codes and numerous supporting files. The two flash codes are known as factory code and customer code. The factory code contains all the serial port diagnostics command but no AT interface command. The customer code contains all AT interface command but minimal set of serial port diagnostics command.
In the ‘Availability’ column, a ‘F’, ‘C’ and ‘B’ indicate the command is available at ‘Factory Code’, ‘Customer Code’ and ‘Both codes’ respectively.
The following is a short list of some of the serial port commands:
Level T - Certification Tests.
Download code
Start manufacturing test
Set drive ‘Age’
Commands to read cert logs, read error logs, write test data to flash, etc.
Level 1 - Memory Control Commands.
Commands to display buffer, display memory, set memory, copy buffer to flash, read
sysvars from disk, etc.
Level 2 - Drive Level Commands
A command to configure the cylinders, heads for testing, gives option for random
cylinder/head and random data patterns
Commands to set data patterns, perform ECC tests, manipulate the error log, dump the
sequencer ram.
Commands to do physical to logical conversion, assign skips and alternates, etc.
Commands to spinup, spindown, seek, read, write, read long, write long, read compare,
sleep, set retries, etc.
Level 3 - Seeking Commands
Display the zone table
Motor acceleration test
Measure head switch & settling times
Display head offset
Move actuator open loop
Seek, seek physical, varying length seek test
Latch test
Display position of actuator
Hysteresis test
Latch Exerciser test
Level 4 - Servo Tracking Commands
Manipulate a skipped cylinder table
Tracking error test
Page 1
Display position error signal
Zap servo burst
Set servo offset
Set/display tracking gain
Send impulse to actuator

Уровень 5. Используется только взаводских условиях Уровень 6 – Команды batch файлов
Batch файлы для тестирования запусков-остановок, переключения головок, CSS, тестов 1, 2, 3 коррекции burts, files to test start-stop, head switch, CSS, 1,2,or 3 burst correction test, назначаемые тесты, тесты сравнения данных, возможность вводить различные batch файлы в RAM. Level 7 - Adaptive Control Commands
Tune parameter control and display
Diagnostic read track
AGC gain control
Perform VCO calibration for all zones

Level 8 - Special Packwriter Commands
- Servo diagnostic sub commands
- Configuration commands
- Lock spin external, spin speed adjust
- Set actuator bias current

Level 9 – Drive Level Command (Full-slipping Defect Management Mode)
Beside the above nine levels of commands, there are two additional sets of commands, the On-line commands and Common commands. The main purpose of On-line command is to display varies type of status. Common command is use to ‘poke’ and ‘peek’ into memoery to allow access to registers, buffer memory and data memory.
2.1 ON-LINE COMMANDS
The On-Line commands may be initiated at any time. For the Interface-specific commands, the Interface code must be present in the current memory map for successful execution; the General commands are always available.
Interface-Specific Commands
Command Description Availability
^E Interface State: Max C.H.S. / RW multiple block size / Current transfer mode settings B
^F Read Segment Record(s) B
^G Write Qu