Hitachi HTS541680J9SA00 Specifications - Page 115

Travelstar 5K160 (SATA) Hard Disk Drive Specification 14.27 Security Disable Password (F6h) Command Block Output Registers Register 76543210 Data -------- Feature -------- Sector Count -------- LBA Low -------- LBA Mid -------- LBA High -------- Device -------- Command 11110110 Command Block Input Registers Register 76543210 Data -------- Error ...See Below... Sector Count -------- LBA Low -------- LBA Mid -------- LBA High -------- Device -------- Status ...See Below... Error Register 7 6 5 4 3 2 1 0 CRC UNC 0 IDN 0 ABT T0N AM N 000 0 0V0 0 Figure 63 Security Disable Password Command (F6h) Status Register 7 6543 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0V0V - 0 0V The Security Disable Password command disables the security mode feature ( device lock function). The Security Disable Password command requests a transfer of a single sector of data from the host including information specified in "Password Information for Security Disable Password command" on Page 5. Then the device checks the transferred password. If the User Password or Master Password matches the given password, the device disables the security mode feature (device lock function). This command does not change the Master Password which may be re-activated later by setting User Password. This command should be executed in device unlock mode. Word Description 00 Control word bit 0 : Identifier (1-Mater, 0-User) bit 1-15 : Reserved 01-16 Password (32 bytes) 17-255 Reserved Figure 64 Password Information for Security Disable Password command The device will compare the password sent from this host with that specified in the control word. Identifier Zero indicates that the device should check the supplied password against the user password stored internally. One indicates that the device should check the given password against the master password stored internally. 115/167