IBM DTLA-305040 Hard Drive Specifications - Page 138
NOP 00h
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12.10 NOP (00h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature V V V V V V V V Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 0 0 0 0 0 0 0 0 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count Initial Value Sector Number Initial Value Cylinder Low Initial Value Cylinder High Initial Value Device/Head Initial Value Status see below Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 00000V00 Status Register 7 6 5 4 3 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 V 0 - - 0 -V Figure 96. NOP Command (00h) This command always fails with an error. The device responds with command aborted. Output parameters to the device Feature Subcommand code 00H Abort any outstanding queue 01H - FFH Not abort any outstanding queue The value of Sector Count, Sector Number, Cylinder High/Low, Device/Head set by host is not changed. Deskstar 40GV & 75GXP hard disk drive specifications 126
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