Hitachi HTS541680J9AT00 Specifications - Page 139

Travelstar 5K160 (PATA) Hard Disk Drive Specification 14.30 Security Set Password (F1h) Command Block Output Registers Register 76543210 Data -------- Feature -------- Sector Count -------- LBA Low -------- LBA Mid -------- LBA High -------- Device - - -D- - - - Command 11110001 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 92 Security Set Password Command (F1h) Status Register 7 6543 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0V0 - - 0 -V The Security Set Password command enables security mode feature (device lock function), and sets the master password or the user password. The security mode feature (device lock function) is enabled by this command, and the device is not locked immediately. The device is locked after next power on reset or hard reset. When the MASTER password is set by this command, the master password is registered internally, but the device is NOT locked after next power on reset or hard reset. This command requests a transfer of a single sector of data from the host including the information specified in the following figure. The data transferred controls the function of this command. Word Description 00 Control word bit 0 : Identifier (1-Mater, 0-User) 01-16 17-18 19-255 bit 1-7 : Reserved bit 8 : Security level (1-Maximum, 0-High) bit 1-15 : Reserved Password (32 bytes) Master Password Revision Code (valid if Word 0 bit 0 = 1) Reserved Figure 93 Security Set Password Information Identifier Security Level 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. Zero indicates High level, one indicates Maximum level. If the host sets High level and the password is forgotten, then the Master Password can be used to unlock the device. If the 139/188