Samsung M8-DVR manual Recalibrate 10h, Security Disable Password F6h, Security Erase Prepare F3h

8.2.21Recalibrate (10h)

This command is obsolete in the ATA7 specification. The supporting of this command is for backward compatibility purpose. The use of this command is beyond the ATA standard and not recommended by the manufacturer.

This command moves the read/write heads from anywhere on the disk to cylinder 0. Upon receipt of the command, the drive issues a seek to cylinder zero. The drive then waits for the seek to complete before updating status, clearing BSY, and generating an interrupt. If the drive cannot reach cylinder 0, it posts a Track 0 Not Found error.

8.2.22Security Disable Password (F6h)

The SECURITY DISABLE PASSWORD command transfers 512 bytes of data from the host. In Table 6-6 it defines the content of the security password. If the password selected by word 0 matches the password previously saved by the device, the device shall unlock mode. This command shall not change the Master password. The Master password shall be reactivated only when a User password is set.

	Table 8-7 Security password content
Word		Content
0	Control word.
	Bit 0	Identifier 0	= compare User password
	Bit (15:1)Reserved	1	= compare Master password
1-16	Password (32 bytes)
17-255	Reserved

8.2.23 Security Erase Prepare (F3h)

The SECURITY ERASE PREPARE command shall be issued immediately before the SECURITY ERASE UNIT command to enable device erasing and unlocking. This command prevents accidental loss of data on the device.

8.2.24Security Erase Unit (F4h)

This command transfers 512 bytes of data from the host. Table 6-7 defines the content of this information. If the password does not match the password previously saved by the device, the device shall reject the command with by abortion.

Spinpoint M8-DVR Disti Product Manual REV 2.0 59