5K320 SATA OEM Specification
Figure 7 Password Lost
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.
12.9.6Command Table
This table shows the device’s response to commands when the Security Mode Feature Set (Device lock function) is enabled.
- 62 -
