Datasheet

7K500 OEM Specification
Page 62 of 176
Figure 7 Password Lost
.3 Attempt limit for SECURITY UNLOCK command
Attempt limit for SECURITY UNLOCK command Attempt limit for SECURITY UNLOCK command
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.
12.9.6
12.9.612.9.6
12.9.6 Command Table
Command Table Command Table
Command Table
This table shows the device’s response to commands when the Security Mode Feature Set (Device
lock function) is enabled.