Re: RH 7.2 boot problem

["Hank Lee" <hlee11 san rr com>]

First, I am new on multi-boot among scsi and ide.
I got scsi and ide runing a p166 box for test purpose.
My bios is old that it only allows me to disable ide which
end up useless because linux does not access hd based on
the info past from bios. What I did is
1. leave the ide on the primary master
2. install rh on my first scsi sda1
3. install grub on the mbr of my primary ide drive.

By this way I can also boot my 
win311 on hda1 (amazing, I still keep it with WP6.0)
win98 on sdb1
win2000 on sdc1 (just for test, not care the speed)
 
What I need to do if I pull my ide out is re-run grub to
install grub back to my sda1 or sda before pull it out.  
One trick is, to boot sdb1 or sdc1, I need to add

    map (hd2) (hd0)
    map (hd0) (hd2)

under the title for each in grub.conf. Ti lilo.conf it will be
    map-drive=x082
    to=0x80
    map-drive=0x80
    to=0x82

I think these are to switch the harddrive control to have some
os boot ok. I got "Load Windows98" (my title) if I remove these
command in the configure file

Hope this info useful.

Hank






----- Original Message ----- 
From: "Chiu, PCM (Peter) " <P C M Chiu rl ac uk>
To: "'Hank Lee'" <hlee11 san rr com>; <redhat-install-list redhat com>
Cc: "Chiu, PCM (Peter) " <P C M Chiu rl ac uk>
Sent: Friday, May 03, 2002 3:02 AM
Subject: RE: RH 7.2 boot problem


Hank,

At the end, I installed RH 7.2 on the 160GB Maxtor
disk hanging as the master on the primary IDE bus.
It works okay after the installation.

I recall seeing a similar problem on a system with
both IDE and SCSI disks and using SCSI disk as boot disk.  
The suggestion was to put in a parameter to the linux 
prompt BIOS=0x80 to switch between IDE and SCSI.  
But at this point, GRUB is not even started, so 
no hope on this.

So the question is how to enable GRUB as the boot manager
on the master boot record on sda1?

Peter

-----Original Message-----
From: Hank Lee [mailto:hlee11 san rr com]
Sent: 03 May 2002 06:53
To: redhat-install-list redhat com
Cc: Chiu, PCM (Peter) 
Subject: Re: RH 7.2 boot problem


Problem should be caused by primary ide. Try to install
grub on the ide's mbr. 

Hank


----- Original Message ----- 
From: "Chiu, PCM (Peter) " <P C M Chiu rl ac uk>
To: <redhat-install-list redhat com>
Cc: "Chiu, PCM (Peter) " <P C M Chiu rl ac uk>
Sent: Thursday, May 02, 2002 5:18 AM
Subject: RH 7.2 boot problem


We have an Intel PC with 2xPentium 2 450MHz cpus currently
running RH 7.1 on one of the SCSI disks (sdb1). 

I added in a Maxtor 160GB disk and a DVD on the IDE primary bus.
The secondary IDE bus is connected with a Toshiba CD-R drive.

A Yamaha CD-WR is also connected to a separate SCSI bus (sdc).

I mounted a new RH 7.2 on a second SCSI disk (sda1) using 2 partitions:
(sda1: as / and sda2: as swap) and specified the following:
a. use GRUB, 
b. install boot record on /dev/sda1, first sectior of boot partition, and
c. default boot disk being /dev/sda1.

The installation appears to complete okay with no error.
But when it boots up, it complained missing operating system.
No GRUB window is displayed.

I rebooted the system, now using the rescue floppy built durning
the installation, but got the same error.

I can still boot up the old 7.1 system on sdb1, and checked 
the grub.conf on /dev/sda1, but nothing seems unusal.
I can see the new Maxtor as hda, and the dvd as hdb.

Any idea where it might gone wrong?  It appears to me the
installation procedure fails to set the boot record onto the
SCSI disk sda1.  Is it because of the presence of the hda?



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