Security Unlock (F2H); Seek (7Xh); Set Features (Efh); Table 8-10 Identifier And Security Level Bit Interaction - Samsung SpinPoint M9T Product Manual

Identifier
Level
User High
User
Medium
Master High or
Medium

8.2.27 Security Unlock (F2h)

This command transfers 512 bytes of data from the host.
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 the user then the device needs to 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.

8.2.28 Seek (7xh)

This command has become obsolete in the ATA7 specification. The supporting of this command is just for
backward compatibility purpose.

8.2.29 Set Features (EFh)

This command is used by the host to establish the following parameters, which affect the execution of certain
drive features as shown below.
Spinpoint M9T Product Manual REV 1.0

Table 8-10 Identifier and security level bit interaction

The password supplied with the command shall be saved as the
new User p ass wo rd . 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 p as swo rd . 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 device 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
If the Identifier bit is set to Master and the device
60