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Costa, The FPDMA Setup FIS is bidirectional as you noted. Only the Device to Host application is defined, however. At one point in the development of ATA-7, I recommended changing it to avoid unnecessary confusion, but some of the members objected on the grounds it was defined that way in SATA, and being defined is not a problem even if there was no application. The theory is that the Host to Device Setup FIS may be used someday for DMA'ing commands or other information to the device. John Masiewicz Western Digital (949) 672-7686 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Constantine Sapuntzakis Sent: Thursday, January 06, 2005 11:08 PM To: [email protected] Subject: [t13] Why is FPDMA Setup FIS spec'ed as bi-directional? This message is from the T13 list server. Why is FPDMA Setup FIS spec'ed as bi-directional? It seems that in current protocols, only the device sends this FIS. Thanks, -Costa
