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Date:      Thu, 9 Mar 2000 20:24:26 +0100
From:      Samuel Tardieu <sam@inf.enst.fr>
To:        John Hay <jhay@mikom.csir.co.za>
Cc:        FreeBSD-current <freebsd-current@FreeBSD.ORG>
Subject:   Re: ata, DMA and the install floppies
Message-ID:  <2000-03-09-20-24-26%2Btrackit%2Bsam@inf.enst.fr>
In-Reply-To: <200003091901.VAA99897@zibbi.mikom.csir.co.za>; from jhay@mikom.csir.co.za on Thu, Mar 09, 2000 at 09:01:31PM %2B0200
References:  <200003091901.VAA99897@zibbi.mikom.csir.co.za>

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| ad0: WRITE command timeout - resetting
| ata0: resetting devices .. done
| ad0: WRITE command timeout - resetting
| ata0: resetting devices .. done
| ...
| 
| It seems that it is just going on and on. Shouldn't it back down to non
| DMA mode after a while? Is there a way to disable the DMA on the install
| floppies?

How many times did it retry? It looks like everything is in place to default
to PIO mode in this case, but you have allow it to try 3 times before it
fallbacks to PIO.

>From ata-disk.c log:

revision 1.59
date: 2000/03/05 16:52:23;  author: sos;  state: Exp;  lines: +24 -24
[...]
Update the timeout code to try fallback to PIO if problems
arise in DMA mode.
----------------------------



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