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3.15 Hard Disk Test Detail Status
When an error occurs in the Hard Disk Test, the following message is displayed:
HDC status = XXXXXXXX
Detailed information about the Hard Disk Test error is displayed on the screen by an eight-digit
number. The first four digits represent the hard disk controller (HDC) error status and the last four
digits are not used.
The HDC error status is composed of 2 bytes; the first byte displays the contents of the HDC status
register in hexadecimal form and the second byte displays the HDC error register.
The contents of the HDC status register and error register are described in Tables 3-4 and 3-5.
Bit
Name
BSY
7
(Busy)
DRDY
6
(Drive ready)
DWF
5
(Drive write fault)
DSC
4
(Drive seek complete)
DRQ
3
(Data request)
CORR
2
(Corrected data)
IDX
1
(Index)
ERR
0
(Error)
Table 3-4 HDC status register contents
Description
"0"--HDC is busy.
"1"--HDC is ready.
"0"--Hard disk drive is not ready to accept any command.
"1"--Hard disk drive is ready.
"0"--DWF error is not detected.
"1"--Write fault condition occurs.
"0"--The hard disk drive heads are not settled over a track.
"1"--The hard disk drive heads are settled over a track.
"0"--Drive is not ready to transfer data.
"1"--Drive is ready for data transfer.
"0"--Other.
"1"--Correctable data error is corrected.
"0"--Other.
"1"--Index is sensed.
"0"--Other.
"1"--The previous comand was terminated with some error.
3-35
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