Hitachi HTS541040G9AT00 Specifications - Page 181
Sleep E6h/99h
UPC - 000059826569
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13.38 Sleep (E6h/99h) Table 116: Sleep (E6h/99h) 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 0 0 1 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 V0V - 0 - V This command is the only way to cause the device to enter Sleep Mode. When this command is issued, the device confirms the completion of the cached write commands before it asserts INTRQ. Then the device is spun down, and the interface becomes inactive. The only way to recover from Sleep Mode is with a software reset or a hardware reset. The use of hardware reset to recover from Sleep Mode may be incompatible with continued operation of the host system. If the device is already spun down, the spin down sequence is not executed. Travelstar 5K100 Hard Disk Drive Specification 167