Figure 31 Password Lost - Hitachi HTS541616J9AT00 - Travelstar 160 GB Hard Drive Specifications

Travelstar 5K160 (PATA) Hard Disk Drive Specification

Figure 31 Password Lost

12.8.5.5 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.
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