Messages in this thread | | | Date | Thu, 3 Jun 2004 12:39:07 +0200 | From | Andries Brouwer <> | Subject | Re: 2.6.x partition breakage and dual booting |
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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.
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