Hitachi HDS723020BLA642 manual Write DMA Ext 35h, Write DMA Ext Command 35h

7K200 SATA OEM Specification

14.44Write DMA Ext (35h)

	Command Block Output Registers																								Command Block Input Registers
	Register					7		6				5		4			3		2			1	0		Register					7			6	5		4	3			2	1			0
	Data Low				-		-				-		-			-		-			-		-		Data Low					-		-		-		-	-		-		-		-
	Data High				-		-				-		-			-		-			-		-		Data High					-		-		-		-	-		-		-		-
	Feature		Current			-		-				-		-			-		-			-	-		Error									...See Below...
			Previous			-		-				-		-			-		-			-	-
	Sector Count		Current			V			V			V		V			V		V			V	V		Sector Count			HOB=0		-			-	-		-	-			-	-			-
			Previous			V			V			V		V			V		V			V	V					HOB=1		-			-	-		-	-			-	-			-
	LBA Low		Current			V			V			V		V			V		V			V	V		LBA Low			HOB=0		V			V	V		V	V			V	V			V
			Previous			V			V			V		V			V		V			V	V					HOB=1		V			V	V		V	V			V	V			V
	LBA Mid		Current			V			V			V		V			V		V			V	V		LBA Mid			HOB=0		V			V	V		V	V			V	V			V
			Previous			V			V			V		V			V		V			V	V					HOB=1		V			V	V		V V V					V			V
	LBA High		Current			V			V			V		V			V		V			V	V		LBA High			HOB=0		V		V		V		V	V		V		V		V
			Previous			V			V			V		V			V		V			V	V					HOB=1		V			V	V		V	V			V	V			V
	Device				-		1				-		-			-		-			-		-		Device					-		-		-		-	-		-		-		-
	Command				0		0				1		1			0		1			0		1		Status									...See Below...
				Error Register																									Status Register
7		6	5	4	3					2					1					0				7		6	5		4		3				2			1				0
	CRC	UNC	0	IDN	0				ABT					T0N					AMN					BSY		RDY	DF		DSC	DRQ				COR			IDX				ERR
	V	0	0	V	0						V				0					0				0		V	0		V		-				0			0				V

Table 128 Write DMA Ext Command (35h)

The Write DMA Ext command transfers one or more sectors of data from the host to the device, then the data is written to the disk media.

The sectors of data are transferred through the Data Register 16 bits at a time.

The host initializes a slave-DMA channel prior to issuing the command. Data transfers are qualified by DMARQ and are performed by the slave-DMA channel. The device issues only one interrupt per command to indicate that data transfer has terminated and status is available.

If an uncorrectable error occurs, the write will be terminated at the failing sector

Output Parameters To The Device

Sector Count Current	The number of continuous sectors to be transferred low order, bits (7:0).
Sector Count Previous	The number of continuous sectors to be transferred high order bits (15:8). If 0000h in
	the Sector Count register is specified, then 65,536 sectors will be transferred.
LBA Low Current	LBA (7:0).
LBA Low Previous	LBA (31:24).
LBA Mid Current	LBA (15:8).
LBA Mid Previous	LBA (39:32).
LBA High Current	LBA (23:16).
LBA High Previous	LBA (47:40).
Input Parameters From The	Device
LBA Low (HOB=0)	LBA (7:0) of the address of the first unrecoverable error.
LBA Low (HOB=1)	LBA (31:24) of the address of the first unrecoverable error.
LBA Mid (HOB=0)	LBA (15:8) of the address of the first unrecoverable error.
LBA Mid (HOB=1)	LBA (39:32) of the address of the first unrecoverable error.
LBA High (HOB=0)	LBA (23:16) of the address of the first unrecoverable error.
LBA High (HOB=1)	LBA (47:40) of the address of the first unrecoverable error.

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