This message is from the T13 list server.
On Tue, 7 Dec 2004 15:42:21 -0800, Mark Overby wrote: >This message is from the T13 list server. >I can firmly state that there are at least two host controllers on the >market that support command queuing for ATA devices in hardware. OK, then I would agree that O/Q should not be removed for either PATA ATA or ATAPI devices. But this is such a mess... * Old style O/Q maybe supported by some PATA ATA devices and maybe by some PATA ATAPI devices (MKE note: The PACKET command supports old style PATA O/Q. Note everyone: The R/W DMA QUEUED commands are the PATA O/Q commands for for ATA devices). * Is old style O/Q supported by SATA for SATA ATA or SATA ATAPI devices? Is there any reason old style O/Q can not be made obsolete for SATA? * Is new style queuing (is that NCQ?) supported for SATA ATAPI? If so, what changes have been made for this (new version of the PACKET command, or new options of the PACKET command)? Is there a definition of new style queuing (NCQ?) for SATA ATAPI? If not, why not? Hale *** Hale Landis *** www.ata-atapi.com ***
