Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
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9.10 Error Register
Table 63: 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 67: ‘Diagnostic codes” on page 76 for the definitions.
9.11 Features Register
This register is command specific. It is used with the Set Features command, the S.M.A.R.T. Function Set com-
mand, and the Format Unit command.
9.12 Sector Count Register
This register contains the number of sectors of data requested to be transferred on a read or write operation between
the host and the device. If the value in the register is set to 0, a count of 256 sectors (in 28-bit addressing) or 65,536
sectors (in 48-bit addressing) is specified.
If the register is zero at command completion, the command was successful. If it is not successfully completed, the
register contains the number of sectors which need to be transferred in order to complete the request.
The contents of the register are defined otherwise on some commands. These definitions are given in the command
descriptions.
76543210
CRC UNC 0 IDNF 0 ABRT TK0NF AMNF
Bit Definitions
ICRCE
(CRC)
Interface CRC Error. When CRC = 1, it indicates that a CRC error has occurred on the data bus
during a Ultra DMA transfer.
UNC Uncorrectable Data Error. When UNC = 1 it indicates that an uncorrectable data error has been
encountered.
IDNF
(IDN)
ID Not Found. When IDN = 1, it indicates that the requested sector's ID field could not be found.
ABRT
(ABT)
Aborted Command. When ABT = 1, it 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. When T0N = 1, it indicates that track 0 was not found during a Recallibrate
command.
AMNF
(AMN)
Address Mark Not Found. This product does not report this error. This bit is always zero.
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