Hitachi HTS541660J9SA00, HTS541640J9SA00, HTS541680J9SA00 manual Initialize Device Parameters 91h

Travelstar 5K160 (SATA) Hard Disk Drive Specification

14.11Initialize Device Parameters (91h)

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				-	-		-	-	-	-	-	-	Data					-	-		-		-			-	-	-	-
Feature				-	-		-	-	-	-	-	-	Error							...See Below...
Sector Count				V	V		V	V	V	V	V	V	Sector Count					-	-			-		-		-	-	-	-
LBA Low				-	-		-	-	-	-	-	-	LBA Low					-	-		-		-			-	-	-	-
LBA Mid				-	-		-	-	-	-	-	-	LBA Mid					-	-			-			-	-	-	-	-
LBA High				-	-		-	-	-	-	-	-	LBA High					-	-			-			-	-	-	-	-
Device				-	-		-	-	H	H	H	H	Device					-	-		-		-			-	-	-	-
Command				1	0		0	1	0	0	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		AM		BSY	RDY	DF	DSC	DRQ				COR					IDX		ERR
											N
0	0	0	0	0			V		0		0		0	0	0	-	-			0						0		V

Figure 44 Initialize Device Parameters Command (91h)

The Initialize Device Parameters command enables the host to set the number of sectors per track and the number of heads minus 1, per cylinder. Words 54-58 in Identify Device Information reflects these parameters.

The parameters remain in effect until the following events:

Another Initialize Device Parameters command is received.

The device is powered off.

Soft reset occurs and the Set Feature option of CCh is set

Output Parameters To The Device

Sector Count The number of sectors per track. 0 does not mean there are 256 sectors per track, but there is no sector per track.

HThe number of heads minus 1 per cylinder. The minimum is 0 and the maximum is 15.

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