From: Chris Lawrence <quango@watervalley.net>
To: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Manfred Spraul <manfred@colorfullife.com>,
Linux Kernel Development <linux-kernel@vger.kernel.org>,
Linux/m68k <linux-m68k@lists.linux-m68k.org>
Subject: Re: Who uses hdx=bswap or hdx=swapdata?
Date: Fri, 4 Jan 2002 01:31:04 -0800 [thread overview]
Message-ID: <20020104093104.GB522@phy.olemiss.edu> (raw)
In-Reply-To: <E16MGPf-0001I3-00@the-village.bc.nu> <Pine.GSO.4.21.0201041009000.12102-100000@vervain.sonytel.be>
In-Reply-To: <Pine.GSO.4.21.0201041009000.12102-100000@vervain.sonytel.be>
On Jan 04, Geert Uytterhoeven wrote:
> On Thu, 3 Jan 2002, Alan Cox wrote:
> > > Is the hdx=bswap or hdx=swapdata option actually in use?
> > > When is it needed?
> >
> > Certain M68K machines
> >
> > > The current implementation can cause data corruptions on SMP with PIO
> > > transfers:
> > >
> > > Is it possible to remove the option entirely, or should it be fixed?
> >
> > Show me an SMP Atari ST 8)
>
> IIRC it's used to access non-Atari IDE disks on Atari (which has a byte-swapped
> IDE interface) and vice-versa.
>
> So yes, you can use it on SMP machines, to access disks that were used before
> on Atari.
The byteswapping flags are also used by people hacking TiVos; the
non-MIPS models have byte-swapped IDE interfaces, and so the bswap
flag is needed to mount a TiVo disk on a PC.
Chris
--
Chris Lawrence <cnlawren@olemiss.edu> - http://www.lordsutch.com/chris/
Instructor and Ph.D. Candidate, Political Science, Univ. of Mississippi
208 Deupree Hall - 662-915-5765
next prev parent reply other threads:[~2002-01-04 9:31 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-03 22:11 Who uses hdx=bswap or hdx=swapdata? Manfred Spraul
2002-01-03 22:17 ` Cort Dougan
2002-01-03 22:32 ` Alan Cox
2002-01-03 22:41 ` Russell King
2002-01-04 9:09 ` Geert Uytterhoeven
2002-01-04 9:31 ` Chris Lawrence [this message]
2002-01-04 10:37 ` Alan Cox
2002-01-04 10:56 ` Geert Uytterhoeven
2002-01-04 17:15 ` Michael Schmitz
2002-01-04 17:20 ` Geert Uytterhoeven
2002-01-04 22:51 ` Richard Zidlicky
2002-01-04 18:43 ` Bernd Eckenfels
2002-01-12 22:40 ` Manfred Spraul
2002-01-13 11:19 ` Geert Uytterhoeven
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