Date: Fri, 24 Aug 2001 19:37:19 +0200 (CEST) From: Søren Schmidt <sos@freebsd.dk> To: Zhihui Zhang <zzhang@cs.binghamton.edu> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: ata0-master: non aligned DMA transfer attempted Message-ID: <200108241737.f7OHbJI88588@freebsd.dk> In-Reply-To: <Pine.SOL.4.21.0108241119200.8160-100000@opal> "from Zhihui Zhang at Aug 24, 2001 11:24:27 am"
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It seems Zhihui Zhang wrote: > > I write a program that writes into a raw device directly. Although the > program runs OK, the system prints messages like: > > ata0-master: non aligned DMA transfer attempted > > What exactly happens here? Is there any problem in my program? You are probably trying to write an amount of data that is not a whole number of the device's blocksize, for harddisks that is 512bytes. -Søren To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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