Figure 7 Password Lost - Hitachi HTS542516K9SA00 Specifications

5K250 (SATA) OEM Specification

Figure 7 Password Lost

12.9.1.4 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 power off. The count and EXPIRE
bit are cleared after a power on reset.
Command Table
12.9.6
This table shows the device's response to commands when the Security Mode Feature Set (Device
lock function) is enabled.
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