From: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
To: Stefan Smietanowski <stesmi@stesmi.com>, Jeff Garzik <jgarzik@pobox.com>
Subject: Re: [PATCH] speed up SATA
Date: Sun, 28 Mar 2004 17:37:13 +0200
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Cc: linux-ide@vger.kernel.org, Linux Kernel <linux-kernel@vger.kernel.org>,
       Andrew Morton <akpm@osdl.org>
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On Sunday 28 of March 2004 09:23, Stefan Smietanowski wrote:
> Hi Jeff.
>
> >> What will happen when a PATA disk lies behind a Marvel(ous) bridge, as
> >> in most SATA disks today?
> >
> > Larger transfers work fine in PATA, too.
>
> Correct me if I'm wrong but wasn't the max number of sectors in a
> transfer limited to 255 instead of 256 because there were buggy
> drives out there before ? I seem to recall something like that but
> I could be wrong.

There was 255 sectors limit in IDE driver but it was based only on _one_
bugreport on _unreliable_ drive (256 sectors causes heavier I/O load).

AFAIR "the other OS" is using 256 sectors so this value is safe.

Regards,
Bartlomiej

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