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From: Mikhail Teterin <mi+kde@aldan.algebra.com>
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Cc: hardware@FreeBSD.org
Subject: Any NCQ patches for SATA?..
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X-List-Received-Date: Tue, 03 Jul 2007 03:26:19 -0000

Hi, Soren!

You may remember my past complaints about the poor write performance of
my SATA drive. Various things were suggested -- including replacing the
cable, and the drive.

Well, today I added another, even bigger SATA drive to my setup and
writing to it still maxes out at about 9MB/sec.

Both drives support NCQ, which the ata(4) still does not support...

	ata4-master: pio=PIO4 wdma=WDMA2 udma=UDMA133 cable=40 wire
	ad8: 476940MB <HDS725050KLA360 K2AOA11A> at ata4-master SATA150
	ad8: 976773168 sectors [969021C/16H/63S] 16 sectors/interrupt 1 depth queue
	ata5-master: pio=PIO4 wdma=WDMA2 udma=UDMA133 cable=40 wire
	ad10: 715404MB <Seagate ST3750640AS 3.AAE> at ata5-master SATA150
	ad10: 1465149168 sectors [1453521C/16H/63S] 16 sectors/interrupt 1 depth queue

I was wondering, if you have any experimental NCQ-patches. Before I place
valuable data on the new drive, I'd be happy to give those a try...

Thanks! Yours,

	-mi