IBM IC25N020ATDA04 Hard Drive Specifications - Page 177
Set Features EFh
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13.29 Set Features (EFh) 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 Note 1. Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 1 1 1 0 1 1 1 1 Command Block Input Registers Register 7 6 5 4 3 2 1 0 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 7 6 5 4 3 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 V 0 - - 0 -V Figure 112. Set Features command (EFh) The Set Feature command establishes the following parameters which affect the execution of certain features as shown in the table below. ABT will be set to 1 in the Error Register if the Feature register contains any undefined values. After the power on reset or hard reset the device is set to the following features as default. Write cache ECC bytes Read look-ahead Reverting to power on defaults Address Offset mode : Enable : 4 bytes : Enable : Disable : Disable Travelstar 48GH, 30GN & 15GN hard disk drive specifications 163