Table 30 Error Register - Western Digital Ultrastar DC HC310 Specifications

8.7 Error Register
7 6
ICRCE UNC

Table 30 Error Register

This register contains status from the last command executed by the device, or a diagnostic code.
At the completion of any command except Execute Device Diagnostic, the contents of this register are valid always
even if ERR=0 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 9.2 Diagnostic and Reset Considerations on page 42 for the definition.
Bit Definitions
ICRCE (CRC) Interface CRC Error. ICRCE=1 indicates a CRC error occurred during FIS transmission or FIS
reception.
UNC Uncorrectable Data Error. UNC=1 indicates an uncorrectable data error has been encountered.
ID Not Found. IDN=1 indicates the requested sector's ID field could not be found.
IDNF (IDN)
ABRT (ABT) Aborted Command. ABT=1 indicates 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 track 0 was not found during a Recalibrate command.
AMNF (AMN) Address Mark Not Found. This product does not report this error. This bit is always zero.
8.8 Features Register
This register is command specific. This is used with the Set Features command, SMART Function Set command and
Format Unit command.
8.9 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 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.
8.10 Sector Number Register
This register contains the starting sector number for any disk data access for the subsequent command.
The sector number is from one to the maximum number of sectors per track.
In LBA mode, this register contains Bits 0-7. At the end of the command, this register is updated to reflect the current
LBA Bits 0-7.
When 48-bit commands are used, the "most recently written" content contains LBA Bits 0-7, and the "previous
content" contains Bits 24-31.
Error Register
5 4 3
0 IDNF 0
Western Digital Hard Disk Drive OEM Specification
2 1 0
ABRT TK0NF AMNF
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