Date: Wed, 20 Feb 2002 13:18:42 -0800 (PST) From: Julian Elischer <julian@elischer.org> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: Terry Lambert <tlambert2@mindspring.com>, sos@freebsd.dk, freebsd-hackers@FreeBSD.ORG Subject: Re: Serverworks ATA controller & data corruption Message-ID: <Pine.BSF.4.21.0202201318210.63302-100000@InterJet.elischer.org> In-Reply-To: <15476.4032.768679.823788@grasshopper.cs.duke.edu>
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basically yes. there is a CRC on the disk block right? On Wed, 20 Feb 2002, Andrew Gallatin wrote: > > Terry Lambert writes: > > > So.. Is PIO safe? Is there any sort of CRC being done on PIO data? > > > > He just said: if your chipset is programmed correctly > > by the BIOS, then there will not be a problem, but > > apparently, there is a very narrow band of "correctly" > > (perhaps even only a single state), and the vendor > > apparently does not default the chip into that state. > > I was asking a more general question about ATA -- I know that UDMA has > has some sort of CRC protection because (on other machines) I've seen > the occasional error about a bad CRC, retrying. But what I don't know > is if PIO offers the same protection. > > Drew > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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