Figure 6 Usual Operation - Hitachi HTS542516K9SA00 Specifications

(*1) refer to Table 35 Command table for device lock operation on Page 60 and Table 36 Command table for
device lock operation - continued on Page 61.

Figure 6 Usual Operation

12.9.1.3 User Password Lost
If the User Password is forgotten and High level security is set, the system user can't access any
data. 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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5K250 (SATA) OEM Specification