Dma Data Transfer Commands; First-Parity Dma Commands - Hitachi HTS542516K9SA00 Specifications

Execution of these commands involves no data transfer.

13.4 DMA Data Transfer Commands

These commands are:
Read DMA
Read DMA Ext
Write DMA
Write DMA Ext
Initiation of the DMA transfer commands is identical to the Read Sector or Write Sector commands
except that the host initializes the slave-DMA channel prior to issuing the command.
The DMA protocol allows high performance multi-tasking operating systems to eliminate processor
overhead associated with PIO transfers.
Refer Functional Specification part for further details.

13.5 First-parity DMA Commands

These commands are:
Read FPDMA Queued
Write FPDMA Queued
Execution of this class of commands includes command queuing and the transfer of one or more
blocks of data between the device and the host. The protocol is described in the section 11.14
"FPDMA Queued command protocol" of "Serial ATA revision 2.6".
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5K250 (SATA) OEM Specification