From: Andries Brouwer <Andries.Brouwer@cwi.nl>
To: Frediano Ziglio <freddyz77@tin.it>
Cc: Andries Brouwer <Andries.Brouwer@cwi.nl>, linux-kernel@vger.kernel.org
Subject: Re: 2.6.x partition breakage and dual booting
Date: Thu, 3 Jun 2004 12:39:07 +0200 [thread overview]
Message-ID: <20040603103907.GV23408@apps.cwi.nl> (raw)
In-Reply-To: <1086245495.3988.4.camel@freddy>
On Thu, Jun 03, 2004 at 08:51:35AM +0200, Frediano Ziglio wrote:
> Actually I'm writing two patch:
> - extending EDD code to provide DPTE informations and signature for all
> drives
> - modify IDE code to match BIOS disks.
That second part is undesirable.
The Linux IDE code is not interested in getting a conjecture about
how other operating systems would name or number the disks.
> How to match BIOS with Linux?
It is impossible. But you can easily do a 95% job.
> I think it's important to know BIOS point of view. Linux provide these
> information so we have two choices to solve the problem:
> - correct the informations we return
> - do not return anything and let user space programs do the job!
Yes, leave it to user space. That is what we do today.
> - EDD 2.0. I don't understand why Linux code int 41h/46h and ignore
> these informations.
Long ago, long before EDD, disks actually had a geometry, and it was
necessary to find it in order to do I/O to e.g. MFM disks.
Today disk geometry is not related to the disk, but to the BIOS.
The kernel has no need to know it.
Andries
next prev parent reply other threads:[~2004-06-03 10:39 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-30 18:04 2.6.x partition breakage and dual booting Jeff Garzik
2004-05-30 18:36 ` Andries Brouwer
2004-05-30 18:56 ` Jeff Garzik
2004-05-30 20:03 ` Andries Brouwer
2004-05-30 20:47 ` viro
2004-05-30 21:06 ` Andries Brouwer
2004-05-30 21:08 ` Andreas Schwab
2004-05-30 21:14 ` viro
2004-05-30 21:02 ` Patrick J. LoPresti
2004-05-30 22:20 ` Andries Brouwer
[not found] ` <mit.lcs.mail.linux-kernel/20040530222001.GD4681@apps.cwi.nl>
2004-05-30 22:54 ` Patrick J. LoPresti
2004-05-31 18:08 ` Tomas Szepe
2004-05-31 19:19 ` Frediano Ziglio
2004-05-31 20:06 ` Patrick J. LoPresti
2004-05-31 21:03 ` Sean Estabrooks
2004-06-01 15:10 ` Patrick J. LoPresti
2004-06-01 23:55 ` Andries Brouwer
2004-06-02 13:02 ` Patrick J. LoPresti
2004-06-02 15:00 ` Matt Domsch
2004-06-02 21:22 ` [PATCH] Better names for EDD legacy_* fields Patrick J. LoPresti
2004-06-02 23:03 ` Andries Brouwer
2004-06-02 23:38 ` Patrick J. LoPresti
2004-06-02 23:53 ` [PATCH] Use decimal instead of hex for EDD values Patrick J. LoPresti
2004-06-01 16:28 ` 2.6.x partition breakage and dual booting Stephen Hemminger
2004-06-03 6:51 ` Frediano Ziglio
2004-06-03 10:39 ` Andries Brouwer [this message]
2004-06-03 12:30 ` Frediano Ziglio
2004-06-03 14:35 ` Bartlomiej Zolnierkiewicz
2004-06-03 15:11 ` Andries Brouwer
2004-06-03 14:46 ` Patrick J. LoPresti
2004-06-03 15:32 ` Bartlomiej Zolnierkiewicz
2004-06-03 15:55 ` Patrick J. LoPresti
2004-05-30 19:35 ` Patrick J. LoPresti
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