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 (HOC) error status number
and the last four digits are not used.
The hard disk controller error status is composed
of
two
bytes; the first byte displays the
contents
of
the HOC status register in hexadecimal form, and the second byte displays the
HOC error register.
The contents
of
the HOC status register and error register are described in Tables 3-4 and 3-5.
Table
3-4
Hard Disk Controller Status Register Contents
Bit
Name
Description
7
BSY
"0"
---HOC is
busy.
(Busy)
"1" ---
HOC
is
ready.
6
DRDY
"0" ---Hard disk drive is not ready to accept any command.
(Drive
ready)
"1" ---Hard disk drive is
ready.
5
DWF
"0"
--
DWF error
is
not detected.
(Drive write
fault)
"1"
---Write fault condition occurred.
4
DSC
"0" ---The
hard
disk drive heads are not settled over a track.
(Drive seek
"1" ---The
hard
disk drive heads are settled over a track.
complete)
3 ORa "0" --- Drive is not
ready
for data transfer.
(Data
request) "1"
--
Drive is
ready
for data transfer.
2
CORR
"0"
---
Other
(Corrected data)
"1" ---Correctable data error is corrected.
1
lOX
"0" --- Other
(Index) "1" ---Index is sensed.
0
ERR
"0" ---Other
(Error)
"1" ---The previous command was terminated with
an
error.
3-35
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