Figure 30 Password Lost - Hitachi CinemaStar P7K500 Specifications

8.6.4.4
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.
User Password Lost
LEVEL ?
Erase Prepare Command
Erase Unit
with Master Password
Normal operation but data lost
8.6.4.5
Attempt limit for SECURITY UNLOCK command
The SECURITY UNLOCK command has an attempt limit. The purpose of this attempt limit is to prevent that
someone attempts to unlock the drive by using various passwords many times.
The device counts the password mismatch. If the password does not match, the device counts it up without
distinguishing the Master password and the User password. If the count reaches 5, EXPIRE bit (bit 4) of
Word 128 in Identify Device information is set, and then SECURITY ERASE UNIT command and
SECURITY UNLOCK command are aborted until a hard reset or a power off. The count and EXPIRE bit are
cleared after a power on reset or a hard reset.
HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1.1)
High
Maximum
Command

Figure 30 Password Lost

73
Unlock CMD with Master Password
Normal operation