Re: Linux-Kernel Archive: ATA overlap/queuing support ?

Andre Hedrick (andre@linux-ide.org)
Thu, 17 May 2001 14:22:45 -0700 (PDT)


Is there support in linux for ATA overlap/queuing ?

It should ( among other things ) improve concurent performance
of two devices on the same channel.

--
David Balazic
--------------

> http://www.uwsg.indiana.edu/hypermail/linux/kernel/0105.2/0022.html

No, queuing is broken and requires a special host to do the auto-polling. Right now only HighPoint has a host that will perform that operation.

Also it requires TFAM and that will not be include until 2.5.

ATA-overlap or ATAPI-overlap? The later is known as DSC based on SFF-8020/8070/8090, I have forgotten where it is located but I have the docs, and it is supported in ide-floppy and ide-tape.

Andre Hedrick Linux ATA Development ASL Kernel Development ----------------------------------------------------------------------------- ASL, Inc. Toll free: 1-877-ASL-3535 1757 Houret Court Fax: 1-408-941-2071 Milpitas, CA 95035 Web: www.aslab.com

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