Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
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12.40 Set Multiple (C6h)
Table 147: Set Multiple command (C6h)
The Set Multiple command enables the device to perform Read and Write Multiple commands and estab-
lishes 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 com-
mands. 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.
Command Block Output Registers Command Block Input Registers
Register 7 6 5 4 3 2 1 0 Register 7 6 5 4 3 2 1 0
Data - - - - - - - - Data - - - - - - - -
Feature - - - - - - - - Error see below
Sector Count V V V V V V V V Sector Count - - - - - - - -
Sector Number - - - - - - - - Sector Number - - - - - - - -
Cylinder Low - - - - - - - - Cylinder Low - - - - - - - -
Cylinder High - - - - - - - - Cylinder High - - - - - - - -
Device/Head 1 - 1 D - - - - Device/Head - - - - - - - -
Command 1 1 0 0 0 1 1 0 Status see below
Error Register Status Register
7654321 0 76543 21 0
CRC UNC 0 IDN 0 ABT T0N AMN BSY RDY DF DSC DRQ COR IDX ERR
00000V0 0 0V0-- 0- V
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