NT of first and Linux on second IDE HD

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2 total messages Started by Moritz Ritter Sat, 23 Jan 1999 00:00

#24751

Author: Moritz Ritter
Date: Sat, 23 Jan 1999 00:00

21 lines
1368 bytes

Hi

I have a PC with 2 IDE HDs. On the first I have a (still working) NT
partition (2.1 GB) and on the second I had a DOS 6.2 partition (1.4 GB) (to
experiment with). I made the second HD boot by changing the BIOS settings (I
like the thougt that both systems can run without using the other disk.).

So, yesterday I installed RedHat 5.1 on the former DOS partition (together
with a swap partition, of course) on HD 2. I did not install lilo in the mbr
(on hda) but in the first sector (?, the other possible option) of hdb and
(fortunatly made a boot disk)

When I now tell the BIOS to boot from the second HD, lilo says only 'LI' and
the computer is dead. When I boot from floppy everything is (or seems to be)
fine.

Both HD's run in LBA mode.

What is the problem?

Thanks for your help!

Re: NT of first and Linux on second IDE HD

#24818

Author: kolja
Date: Mon, 25 Jan 1999 00:00

62 lines
2336 bytes

Moritz Ritter wrote:

> Hi
>
> I have a PC with 2 IDE HDs. On the first I have a (still working) NT
> partition (2.1 GB) and on the second I had a DOS 6.2 partition (1.4 GB) (to
> experiment with). I made the second HD boot by changing the BIOS settings (I
> like the thougt that both systems can run without using the other disk.).

Disk 0x80 gets disk 0x81 and disk 0x81 gets 0x80.(These are the BIOS names)

>
>
> So, yesterday I installed RedHat 5.1 on the former DOS partition (together
> with a swap partition, of course) on HD 2. I did not install lilo in the mbr
> (on hda) but in the first sector (?, the other possible option) of hdb and
> (fortunatly made a boot disk)
>

You installed lilo in the root partition I guess.
Then your NT disk was 0x80, your Linux disk was 0x81.
Lilo "remembered" that his map file is on disk 0x81.

>
> When I now tell the BIOS to boot from the second HD, lilo says only 'LI' and
> the computer is dead. When I boot from floppy everything is (or seems to be)
> fine.
>

Lilo canot find the map file that is now on 0x80.

test it:
??? is your root partition (hdb2)?
dd if=/dev/??? of=/bootsect.lin bs=512 count=1
copy bootsect.lin to C:\
add
C:\bootsect.lin="Linux"
to C:\boot.ini
boot your NT disk.(= 0x80, mapfile on 0x81).

>
> Both HD's run in LBA mode.
>
> What is the problem?
>
> Thanks for your help!

There are options to fix the problem. Read the lilo dokumentation.
(? ?
/dev/hda
disk = 0x81
/dev/hdb
disk=0x80
?  ?)

Maybe you have to use two lilo configurations (one if you booted from your NT
disk or floppy, another if you booted from your Linux disk).

bye
    Kolja

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