Hitachi HDS723020BLA642 Features Register, LBA High Register, LBA Low Register, LBA Mid Register

	7K200 SATA OEM Specification
	encountered.
IDNF (IDN)	ID Not Found. IDN=1 indicates the requested sector’s ID field could not be found.
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. AMN=1 indicates the data address mark has not been found after
	finding the correct ID field for the requested sector.
	This bit is obsolete.

11.6 Features Register

This register is command specific. This is used with the Set Features command, S.M.A.R.T. Function Set command and Format Unit command.

11.7 LBA High Register

This register contains Bits 16-23. At the end of the command, this register is updated to reflect the current LBA Bits 16-23.

When 48-bit addressing commands are used, the “most recently written” content contains LBA Bits 16-23, and the “previous content” contains Bits 40-47. The 48-bit Address feature set is described in “12.14 48-bit Address Feature Set”.

11.8 LBA Low Register

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.

11.9 LBA Mid Register

This register contains Bits 8-15. At the end of the command, this register is updated to reflect the current LBA Bits 8-15.

When 48-bit addressing commands are used, the “most recently written” content contains LBA Bits 8-15, and the “previous content” contains Bits 32-39.

11.10Sector 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.

11.11Status Register

Status Register

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