IBM IC35L020 Hard Drive Specifications - Page 100

13.8.4.4 User Password Lost If the User Password is forgotten and High level security is set, the system user can not access any data. However the device can be unlocked using the Master Password. If a system user forgets the User Password and Maximum security level is set, data access is impossible. However the device can be unlocked using the Security Erase Unit command to unlock the device and erase all user data with the Master Password. User Pasword Lost LEVEL ? High Maximum Erase Prepare Command Erase Unit Command with Master Password Unlock CMD with Master Password Normal operation Normal operation but data lost DERA003.prz Figure 72. Password Lost 13.8.4.5 Attempt limit for SECURITY UNLOCK command The SECURITY UNLOCK command has an attempt limit. The purpose of this attempt limit is to prevent someone from attempting to unlock the drive by using various passwords multiple times. The device counts the password mismatch. If the password does not match, the device counts it 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 the SECURITY ERASE UNIT command and the SECURITY UNLOCK command are then 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. Deskstar 60 GXP Hard disk drive specification 86