Hitachi HTS541680J9AT00 Specifications - Page 74
Attempt limit for SECURITY UNLOCK command
UPC - 683728200794
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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. 74/188