Fujitsu MBA3147NC 用户手册

 

Brief test contents of self-diagnostics are as follows. 

 

a.  Hardware function test 

 
 

This test checks the basic operation of the controller section, and contains following test. 

• 

RAM (microcode is stored) 

• 

Peripheral circuits of microprocessor (MPU) 

• 

Memory (ROM) 

• 

Data buffer 

 

b. Seek 

test 

 
 

This test checks the positioning operation of the HDD using several seek modes (2 points 
seek, 1 position sequential seek, etc.).  The positioning operation is regarded as success when 
the seek operation to the target cylinder is completed. 

 

c. Write/read 

test 

 
 

This test checks the write/read function by using the Internal test space of the HDD. 

 
(1) Initial 

self-diagnostics 

 

When power is turned on, the HDD starts initial self-diagnostics.  The initial self-diagnostics 
checks the basic operations of the hardware functions. 

 

If an error is detected in the initial self-diagnostics, the LED on the HDD blinks (at 0.4-second 
intervals).  In this status, the HDD posts the CHECK CONDITION status to all I/O operation 
requests other than the REQUEST SENSE command.  When the CHECK CONDITION status is 
posted, the initiator should issue the REQUEST SENSE command.  The sense data obtained with 
the REQUEST SENSE command details the error information detected with the initial self-
diagnostics. 

 

Even if CHECK CONDITION status and sense data are posted, the LED continues blinking.  
Only when the power is turned off or re-turned on, this status can be cleared.  When this status is 
cleared, the HDD executes the initial self-diagnosis again. 

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C141-E270