Security Unlock (F2H); Seek (7Xh); Table 6-12 Identifier And Security Level Bit Interaction - Samsung SP0401N Product Manual

DISK DRIVE OPERATION
Identifier
Level
User High
User
Medium
Master
High or
Medium

6.4.25 Security Unlock (F2h)

This command transfers 512 bytes of data from the host. Table 6-9 defines the content of this information.
If the Identifier bit is set to Master and the device is in high security level, then the password supplied shall
be compared with the stored Master password. If the device is in maximum security level then the unlock
shall be rejected.
If the Identifier bit is set to user then the device shall compare the supplied password with the stored User
password.
If the password compare fails then the device shall return command aborted to the host and decrements the
unlock counter. This counter shall be initially set to five and shall be decremented for each password
mismatch when SECURITY UNLOCK is issued and the device is locked. When this counter reaches zero
then SECURITY UNLOCK and SECURITY ERASE UNIT commands shall be command aborted until a
power-on reset or a hardware reset. SECURITY UNLOCK commands issued when the device is unlocked
have no effect on the unlock counter.

6.4.26 Seek (7xh)

This command initiates a seek to the track and selects the head specified in the command block. The drive
need not be formatted for a seek to execute properly. Refer to section 6.6.3 for the protocol. The drive shall
not set DSC=1 until the action of seeking has completed. The drive may return the interrupt before the seek is
completed.
If another command is issued to the drive while a seek is being executed, the drive sets BSY=1, waits for the
seek to complete, and then begins execution of the command.
SpinPoint P80 Product Manual Rev. 01

Table 6-12 Identifier and security level bit interaction

The password supplied with the command shall be saved as the new
User password. The Lock mode shall be enabled from the next power-
on or hardware reset. The device shall then be unlocked by either the
User password or the previously set Master password.
The password supplied with the command shall be saved as the new
User password. The Lock mode shall be enabled from the next power-
on or hardware reset. The device shall then be unlocked by only the
User password. The Master password previously set is still stored in
the devi ce but shall not be used to unlock the device.
Maximum This combination shall set a Master password but shall not
enable or disable the Lock mode. The security level is not changed.
Master password revision code set to the value in Master Password
Revision Code field.
Command result
70