Date: Wed, 20 Feb 2002 16:06:08 -0500 (EST) From: Andrew Gallatin <gallatin@cs.duke.edu> To: Terry Lambert <tlambert2@mindspring.com> Cc: sos@freebsd.dk, freebsd-hackers@FreeBSD.ORG Subject: Re: Serverworks ATA controller & data corruption Message-ID: <15476.4032.768679.823788@grasshopper.cs.duke.edu> In-Reply-To: <3C740DE2.B028B5A5@mindspring.com> References: <15475.50753.252494.269972@grasshopper.cs.duke.edu> <200202201953.g1KJrKq77437@freebsd.dk> <15476.1618.379112.915616@grasshopper.cs.duke.edu> <3C740DE2.B028B5A5@mindspring.com>
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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
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