Diagnostics and Maintenance
Brief test contents of
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 (RAM)
•Data buffer
b.Seek test
This test checks the positioning operation of the disk drive using several seek modes (2 points seek, 1 position sequential seek, etc.). The positioning operation is checked with confirming the physical address information by reading the ID field (LBA) from the data block on track 0 after completion of the seek operation to the target cylinder.
c.Write/read test
This test checks the write/read function by using the Internal test space of the disk drive.
(1)Initial
When power is turned on, the IDD starts initial
If an error is detected in the initial
Even if CHECK CONDITION status and sense data are posted, the IDD continues sending the Fault LED Out signal to the interface connector. Only when the power is turned off or
|