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Date: Wed, 16 Feb 2005 06:31:05 -0800 (PST)
From: Rob <spamrefuse@yahoo.com>
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	FreeBSD questions <freebsd-questions@freebsd.org>,
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Subject: Re: UDMA ICRC error
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Ramiro Aceves wrote:
> 
> I have read that others had this problem before. I
> just write this report for you to know.
> 
> When I installed FreeBSD 5.3 R, I get some errors
> like this, but I could end the install:
> 
> ad0: WARNING -READ_DMA UDMA ICRC error (retrying 
>         request) LBA=5313599
> ad0: FAILURE -READ_DMA status=51<READY,DSC,ERROR>
>         error=84 >ICRC,ABORTED>
> spec_getpages:(ad0s1a) I/O read failure: (error=5)
> ................
> 
> I have solved the problem disabling DMA:
> hw.ata.ata_dma="0"
> 
> (I previously tried disabling ACPI with no success,
> and playing with BIOS LBA, LARGE, NORMAL settings
> at the BIOS with no success).
> 
> Now ad0: works in PIO4 mode and everything is fine,
> previously , it was UDMA33. Now there are no errors.

There's you and me now. I have this problem with two
of my PCs. I don't know yet of anybody else who has
these problems.

It's indeed a serious problem, but too few people
running 5.3 seem to suffer from this.

Have you tried with 4.11?
I bet that would not generate these problems.

Regards,
Rob.

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