Hitachi HTS541040G9AT00 Specifications - Page 171
Security Unlock F2h
UPC - 000059826569
View all Hitachi HTS541040G9AT00 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 171 highlights
13.31 Security Unlock (F2h) Table 109: Security Unlock (F2h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count LBA Low LBA Mid LBA High Device 1 - 1 D - - - - Command 1 1 1 1 0 0 1 0 76 CRC UNC 00 Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN 00 0 V 0 0 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count LBA Low LBA Mid LBA High Device Status see below Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 V0- - 0 - V This command unlocks the password and causes the device to enter device unlock mode. If a power on reset or hard reset is done without executing the Security Disable Password command after this command is completed, the device will be in device lock mode. The password has not been changed yet. The Security Unlock command requests to transfer a single sector of data from the host including information specified in the table below. If the Identifier bit is set to master and the drive is in high security mode, the password supplied will be compared with the stored master password. If the drive is in maximum security mode, the security unlock will be rejected. If the Identifier bit is set to user, the drive compares the supplied password with the stored user password. If the password compare fails, the device returns an abort error to the host and decrements the unlock attempt counter. This counter is initially set to 5 and is decremented for each password mismatch. When this counter reaches zero, all password protected commands are rejected until there is a hard reset or a power off. Word Description 00 Control Word bit 0 : Identifier (1- Master, 0- User) bit 1-15 : Reserved 01-16 Password (32 bytes) 17-255 Reserved Identifier A zero indicates that the device regards Password as the User Password. A one indicates that the device regards Password as the Master Password. The user can detect if the attempt to unlock the device has failed due to a mismatched password since this is the only reason that an abort error will be returned by the drive AFTER the password information has been sent to the device. If an abort error is returned by the device BEFORE the password data has been sent to the drive, then another problem exists. Travelstar 5K100 Hard Disk Drive Specification 157