Re: ide-problem still with 2.4.21-pre5-ac1

Bill Davidsen (
Sat, 8 Mar 2003 17:28:10 -0500 (EST)

On Thu, 6 Mar 2003 wrote:

> * 1. CHS value set by user (whatever user sets will be trusted)
> * 2. LBA value from target drive (require new ATA feature)
> * 3. LBA value from system BIOS (new one is OK, old one may break)
> * 4. CHS value from system BIOS (traditional style)
> I think that the priority of LBA from BIOS has to be raised to 2 and the
> priority of LBA from drive should be lowered to 3.
> The mapping-problem only appreared with very new drives in some
> brand-computers using a 240-head mapping from the bios.

I think the chances of a drive knowing its own correct LBA info is far
better than the BIOS getting it right. Many BIOS versions don't understand
large drives.

bill davidsen <>
  CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.

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