Device Register; Error Register; Table 42. Device Head/Register; Table 43. Error Register - Hitachi 7K100 - Travelstar - Hard Drive Specifications

10.6 Device Register

Table 42: Device Head/Register
7 6
1 L
This register contains the device and head numbers.
Bit Definitions
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, These contain bits 24-27 of the LBA. At command completion these bits are updated to reflect
HS1, HS0 the current LBA bits 24-27.

10.7 Error Register

Table 43: Error Register
7 6
CRC UNC
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
ICRCE Interface CRC Error. CRC = 1 indicates that a CRC error has occurred on the data bus during a
(CRC) 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 Aborted Command. ABT = 1 indicates that the requested command has been aborted due to a
(ABT) device status error or an invalid parameter in an output register.
TK0NF Track 0 Not Found. T0N = 1 indicates that track 0 was not found during a recallibrate command.
(T0N)
AMNF Address Mark Not Found. AMN = 1indicates that the data address mark has not been found after
(AMN) finding the correct ID field for the requested sector.
5 4 3
1 DRV HS3
5 4 3
0 IDNF 0
Travelstar 7K100 Hard Disk Drive Specification
2 1 0
HS2 HS1 HS0
2 1
ABRT TK0N AMN
62
0