Hitachi 7K250 Specifications - Page 198
Set Multiple C9h
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12.40 Set Multiple (C9h) Table 114: Set Multiple command (C6h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count V V V V V V V V Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 1 1 0 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 Sector Number Cylinder Low Cylinder High Device/Head Status see below Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 V0- - 0 - V The Set Multiple command enables the device to perform Read and Write Multiple commands and establishes the block size for these commands. The block size is the number of sectors to be transferred for each interrupt. If an invalid block size is specified, an Abort error will be returned to the host. The Read Multiple and Write Multiple commands will be disabled. Output parameters to the device Sector Count This indicates the block size to be used for the Read Multiple and the Write Multiple commands. Valid block sizes can be selected from 0, 1, 2, 4, 8, or 16. If 0 is specified, then the Read Multiple and the Write Multiple commands are disabled. Deskstar 7K250 Hard Disk Drive Specification 184