Fujitsu MPD3XXXAT manual Contents of security password

(30)SECURITY DISABLE PASSWORD (F6h)

This command invalidates the user password already set and releases the lock function.

The host transfers the 512-byte data shown in Table 1.1 to the device. The device compares the user password or master password in the transferred data with the user password or master password already set, and releases the lock function if the passwords are the same.

Although this command invalidates the user password, the master password is retained. To recover the master password, issue the SECURITY SET PASSWORD command and reset the user password.

If the user password or master password transferred from the host does not match, the Aborted Command error is returned.

Issuing this command while in LOCKED MODE or FROZEN MODE returns the Aborted Command error.

(The section about the SECURITY FREEZE LOCK command describes LOCKED MODE and FROZEN MODE.)

Table 5.11 Contents of security password

Word			Contents
0		Control word
		Bit 0: Identifier
		0	= Compares the user passwords.
		1	= Compares the master passwords.
		Bits 1 to 15: Reserved
1 to	16	Password (32 bytes)
17 to	255	Reserved

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