Hitachi HTS541616J9SA00, HTS541640J9SA00, HTS541680J9SA00 manual Security Erase Unit F4h, Identifier

Travelstar 5K160 (SATA) Hard Disk Drive Specification

14.29Security Erase Unit (F4h)

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				-	-			-	-			-	-	-	-	Sector Count					-	-			-		-	-	-	-	-
LBA Low				-	-			-	-			-	-	-	-	LBA Low					-	-			-		-	-	-	-	-
LBA Mid				-	-		-		-		-		-	-	-	LBA Mid					-	-			-		-	-	-	-	-
LBA High				-	-		-		-		-		-	-	-	LBA High					-	-			-		-	-	-	-	-
Device				-	-		-		-		-		-	-	-	Device					-	-			-	-		-	-	-	-
Command				1	1		1		1		0		1	0	0	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	V	0				V		0				0		0	V	0	V	-			0					0		V

Figure 66 Security Erase Unit Command (F4h)

The Security Erase Unit command initializes all user data sectors, then disables the device lock function.

Note that the Security Erase Unit command initializes from LBA 0 to Native Max LBA. Host Max LBA set by Initialize Drive Parameter or Set Max Address command is ignored. So the protected area by Set Max Address command is also initialized.

This command requests to transfer a single sector data from the host including information specified in “Erase Unit Information” on Page 5.

If the password does not match then the device rejects the command with an Aborted error.

	Word	Description
00		Control word
		bit 0	: Identifier (1-Mater, 0-User)
		bit 1-15	: Reserved
01-16		Password	(32 bytes)
17-255		Reserved
Figure 67 Erase Unit Information
Identifier		Zero indicates that the device should check the supplied password against the user password
		stored internally. One indicates that the device should check the given password against the
		master password stored internally.

The Security Erase Unit command erases all user data and disables the security mode feature (device lock function). So after completing this command, all user data will be initialized to zero with write operation. At this time, it is not verified with read operation whether the sector of data is initialized correctly. Also, the defective sector information and the reassigned sector information for the device are not updated. The security erase prepare command should be completed immediately prior to the Security Erase Unit command. If the device receives a Security Erase Unit command without a prior Security Erase Prepare command the device aborts the security erase unit command.

This command disables the security mode feature (device lock function), however the master password is still stored internally within the device and may be re-activated later when a new user

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