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Re: grub floppy snafu

From: Haines Brown
Subject: Re: grub floppy snafu
Date: Mon, 4 Oct 2004 12:54:47 -0400 (EDT)

> >   d) the method I used successfully is simply to point the
> >      root command at what grub incorrectly thinks is the correct
> >      disk (so, for the third disk, I use `root (hd1,0)').
> As I said, GRUB is not incorrect about anything.  It is either you or
> the BIOS which is incorrect. :)
> If GRUB/the BIOS does not does work like you would expect because you
> are used to how things are numbered, it does not mean GRUB is broken.

My BIOS numbers my hard disk #0 sba, #1 sbb, #2 sbc. That's how I
configured the BIOS, and that's the sequence of disks reported when I
boot. While I suppose it is theoretically possible for BIOS to
reconfigure itself spontaneously some other way, I doubt it.

I'm not suggesting grub is broken. However, I believe it states in the
manual that grub can't actually detect the disk sequence, but must
infer it and therefore can easily get it wrong. If it does not guess
correctly, it becomes my task to remap the devices so that grub
handles them correctly. 

My question had only to do with the consequences of the method I used
to remap the disks. I did it by altering the root command as follows:

  sda   gets command: root (hd0,0)
  sdb   gets command: root (hd2,0)
  sdc   gets command: root (hd1,0)

My question was a simple one: is the method here used to remap disks
likely to cause problems after the boot is complete?

Haines Brown


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