Hitachi 2.5 inch SATA Travelstar HTS543232L9A300 Oem Specification page 61

(*1) refer to Table 35 Command table for device lock operation on Page 63 and Table 36 Command table for
device lock operation - continued on Page 64.
Figure 6 Usual Operation
User Password Lost
If the User Password is forgotten and High level security is set, the system user can't access any
dat a. However the device can be unlocked using the Master Password.
If a system user forgets the User Password and Maximum security level is set, data access is
impossible. However the device can be unlocked using the Security Erase Unit command to unlock
the device and erase all user data with the Master Password.
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5K320 SATA OEM Specification