Hitachi 7K250 Specifications - Page 123
Check Power Mode E5h/98h
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UPC - 000004558972
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12.1 Check Power Mode (E5h/98h) Table 51: Check Power Mode command (E5h/98h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 1 1 1 0 0 1 0 1 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count V V V V V V V V Sector Number Cylinder Low Cylinder High Device/Head Status see below 76 CRC UNC 00 Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN 00 0 V 0 0 Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 V0- - 0 - V The Check Power Mode command will report whether the device is spun up and the media is available for immediate access. Input parameters from the device Sector Count This indicates the power mode code. The command returns FFh in the Sector Count Register if the spindle motor is at speed and the device is not in Standby or Sleep mode. Otherwise, the Sector Count Register is set to 0. Deskstar 7K250 Hard Disk Drive Specification 109
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