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From: erik quanstrom <quanstro@qua...>
Subject: venti+fossil problems on new install
Date: Thu, 21 Sep 2006 18:22:20 -0500

thanks for pointing out my misunderstanding.

if dma is enabled, why does my nForce4 chipset get such bad SATA
performance?  "dd -if /dev/sdF0/data -count n" maxes out at ~3MB/sec.

this is the drive configuration:

ladd# cat /dev/sdE0/ctl
inquiry WDC WD2500JS-00MHB0                     
config 427A capabilities 2F00 dma 00550040 dmactl 00000000 rwm 16 rwmctl 0 lba48always off
geometry 488395055 512 16383 16 63
[etc.]

- erik