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Date:      Tue, 5 Jan 1999 15:21:41 +1030
From:      Greg Lehey <grog@lemis.com>
To:        Dru Nelson <dnelson@redwoodsoft.com>
Cc:        freebsd-hackers@FreeBSD.ORG
Subject:   Re: UDMA in 2.2.8 - patches?
Message-ID:  <19990105152140.C78349@freebie.lemis.com>
In-Reply-To: <Pine.BSF.3.91.990104202544.1500I-100000@pacman.redwoodsoft.com>; from Dru Nelson on Mon, Jan 04, 1999 at 08:46:43PM -0800
References:  <Pine.BSF.3.91.990104202544.1500I-100000@pacman.redwoodsoft.com>

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On Monday,  4 January 1999 at 20:46:43 -0800, Dru Nelson wrote:
>
> Hi,
>
> I'm now working with a big site and I'm moving them over
> to FreeBSD from Linux for stability.  The unfortunate thing
> is that almost all of the machines use IDE drives.
>
> I haven't tried 3.0 and I don't know how stable it is yet. I want
> to have machines that run for many, many days and freebsd 2.[12].*
> has done time and time again in the past.  So, I'm running 2.2.8 on
> some of these machines right now. It has everything I need, except for
> UDMA support (soft updates would be nice :-), but I can wait for that in
> 3.0).
>
> IDE will be OK for these machines, I'm just worried about too many
> interupts and not getting good IO performance.
>
> What is the outlook or possible big ugly monster involved with
> getting DMA or some of the EIDE features into 2.2.8 (Intel only
> chipsets)?  I have no problem with putting something in /sys/pci
> to get going on this... *(I'm willing to spend some time on this)*
>
> I can rationalize adding support for DMA 2.2.8, and testing it thoroughly,
> I can't see going to 3.0 just yet.

I think that the chances are slim of getting a version of 2.2.8 with
UDMA support as stable as 3.0 already is.  It's not that bad.  -STABLE
will be out in the middle of the month.

Greg
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