Re: Fedora Core 2/Windows XP dual boot: selecting Linux doesn't work

g.devries@xxxxxxxxxx wrote:
> Peter T. Breuer wrote:
>> g.devries@xxxxxxxxxx wrote:

>> > Yes, it's odd that the hard disk I installed later should be hdc/hd0.
>>
>> It's false - hd0 is your boot device. Look in your bios and tell us
>> which your boot device is. I suspect you have got them the wrong way
>> round.

> The boot devices are:
> 1: floppy drive
> 2: Maxtor 6L080M0
> 3: CD-ROM

> This Maxtor 6L080M0 is an SCSI Disk Device, under Sata RAID Controller.

Eh? What? Is it scsi or isn't it? SATA is serial-ATA, which is not
scsi!

You'll have to make a bit more sense for me there, I'm afraid.

I'm going to work on the supposition that that is IDE, not scsi, and
that the "raid" is some software raid which doesn't exist at the
moment (only one disk anyway). So that is your hde?

Anyway, it'll be hd0, for the little I know of grub's weird
numbering system.

All I can see in the grub info file is:

Note that GRUB does _not_ distinguish IDE from SCSI - it simply counts
the drive numbers from zero, regardless of their type. Normally, any
IDE drive number is less than any SCSI drive number, although that is
not true if you change the boot sequence by swapping IDE and SCSI
drives in your BIOS.

Which seems to me to confirm my impression that they count in bios bot
order.

Why don't you check the info out?

Then you can send a LART for this:

That was easy, admit it. Do read the next chapter, to find out how to
actually install GRUB on your drive.

No - it was incredibly unclear, like all the grub documentation. Rumor
has that it is written originally in dutch by a blind monkey.

> The other hard disk is a Maxtor 92040U6, at the secondary IDE Channel.

That is your hdc? I suppose that would be hd1 to grub.

>> If you have your bios
>> set to boot from hde, then that is hd0 to grub, I believe. And you WANT
>> to boot from hde, don't you? You WANT the windows bootloader tobe
>> first.

> The 92040U6 is hdc and the 6L080M0 is hde, right? In that case, yes, I
> want to boot from hde.

So that's the way yu have your bios set? Then hde is hd0.

>> Try harder. (Don't say "try", tell us what you DID). I would imagine
>> that hd0 is hde from your symptoms, so you need to install grub again.
>> Editing a file will do nothing.

> In grub.conf, I changed every occurrence of "hd0" to "hd1" and vice
> versa. But if the mapping is still wrong in device.map, that won't be

I don't know what "device.map" is. I've never heard of it. Oh - it's
some grub thing. yes, now THERE you can see what the mapping is! DON'T
CHANGE IT.

> of much help, I guess.

> If I change device.map to
> (hd0) /dev/hde
> (hd1) /dev/hdc

DON'T. Why, in heavens name, why? What's wrong with the mapping you
had? You only have to TELL us about it!

Well, anyway, I suppose this changes things to match the probable
facts. But you will have to tell grub to use that mapping file. Why
bother?

> and then change grub.conf to
> title Fedora Core (2.6.5-1.358)
> root(hd1,0)

This points at grub's boot code area on hdc1. I've forgotten
where you said everything was. This should be pointing at the /boot
partition. Does it?

> kernel /vmlinuz-2.6.5-1.358 ro root=LABEL=/

PLEASE DO NOT USE LABELS! Be specifc. Say "root=/dev/hdc2" (or
whatever).

> initrd /initrd-2.6.5-1.358.img

And please do not use ramdisks. Why? Oh why. Is your kernel so
crippled?


> will that be enough? Will these settings be used the next time I try to
> boot?

No. You have done nothing to make it so! Install grub on a boot record,
copy that boot record to windows, and point windows boot.ini at the
copy.


Peter
.

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