Hitachi HTS548040M9AT00 Specifications page 157

This command disables the security mode feature (device lock function), however, the master password is still
stored internally within the device and may be reactivated later when a new user password is set. If you execute this
command on disabling the security mode feature (device lock function), the password sent by the host is NOT
compared with the Master Password and the User Password. The device only erases all user data.
The execution time of this command for each model is shown below:
IC25N080ATMR04-0
IC25N060ATMR04-0
IC25N040ATMR04-0
IC25N030ATMR04-0
IC25N020ATMR04-0
66
50
34
26
18
Travelstar 5K80 Hard Disk Drive Specification
141