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Date:      Mon, 13 Dec 1999 09:03:16 +0100 (CET)
From:      Soren Schmidt <sos@freebsd.dk>
To:        joeo@nks.net
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: Errors from the ata disk driver
Message-ID:  <199912130803.JAA33772@freebsd.dk>
In-Reply-To: <Pine.LNX.4.10.9912111531070.14140-100000@homer.mkintl.com> from "joeo@nks.net" at "Dec 11, 1999 03:35:24 pm"

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It seems joeo@nks.net wrote:
> Will the backdown to PIO mode be permanent till the next reboot of the
> machine, or will the driver be able to attempt to return to DMA mode after
> a timeout period.  I'm only seeing these errors under really heavy disk
> activity (mutlitple nfs readers and writers plus rsync/mirror jobs to the
> vinum volume in question).

The fallback is permanent, but it only occurs after 3 retries on the
failed request. If it fails 3 times in a row, there is something
really wrong on that channel, ie bad cableing etc etc...

-Søren


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