IBM DTCA-24090 Hard Drive Specifications - Page 136

12.19 Security Disable Password (F6h) Command Block Output Registers Register 76543210 Data Feature Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 1D Command 11110110 Command Block Input Registers Register 76543210 Data Error ...See Below... Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status ...See Below... Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 00000V00 Status Register 76543210 BSY RDY DF DSC DRQ COR IDX ERR 0V0V 0 V Figure 79. Security Disable Password Command (F6h) 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 Figure 80. 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 00 01 16 17 255 Description Control word bit 0 : Identifier (1 Master, 0 bit 1 15 : Reserved Password ( 32 bytes ) Reserved User) Figure 80. 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. 128 OEM Specifications of DTCA-2xxxx 2.5 inch H D D