Travelstar 7K100 Hard Disk Drive Specification
62
10.6 Device Register
Table 42: Device Head/Register
This register contains the device and head numbers.
Bit Definitions
10.7 Error Register
Table 43: Error Register
This register contains the status from the last command executed by the device or a diagnostic code. At the comple-
tion of any command except Execute Device Diagnostic, the contents of this register are always valid even if
ERR = 0 is in the Status Register.
Following a power on, a reset, or completion of an Execute Device Diagnostic command, this register contains a
diagnostic code. See Table 47: "Diagnostic codes," on page 66 for the definitions.
Bit Definitions
7
6
5
4
3
2
1
0
1
L
1
DRV
HS3
HS2
HS1
HS0
L
Binary encoded address mode select. When L = 0, addressing is by CHS mode. When L = 1,
addressing is by LBA mode.
DRV
Device. When DRV = 0, device 0 (Master) is selected. When DRV = 1, device 1 (Slave) is
selected.
HS3, HS2,
HS1, HS0
These contain bits 24-27 of the LBA. At command completion these bits are updated to reflect
the current LBA bits 24-27.
7
6
5
4
3
2
1
0
CRC
UNC
0
IDNF
0
ABRT
TK0N
AMN
ICRCE
(CRC)
Interface CRC Error. CRC = 1 indicates that a CRC error has occurred on the data bus during a
Ultra DMA transfer.
UNC
Uncorrectable Data Error. UNC = 1 indicates that an uncorrectable data error has been encountered
IDNF (IDN)
ID Not Found. IDN = 1 indicates that the requested sector's ID field could not be found.
ABRT
(ABT)
Aborted Command. ABT = 1 indicates that the requested command has been aborted due to a
device status error or an invalid parameter in an output register.
TK0NF
(T0N)
Track 0 Not Found. T0N = 1 indicates that track 0 was not found during a recallibrate command.
AMNF
(AMN)
Address Mark Not Found. AMN = 1indicates that the data address mark has not been found after
finding the correct ID field for the requested sector.
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