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Old 06-02-2004, 08:30 AM   #1
GrumpyGnome
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Registered: May 2004
Location: El Sobrante, CA (the scraps)
Distribution: Fedora, RH, & Slack
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Fedora C2 & Win98 Dual Boot Problem


I can not get Win98 and Fedora C2 running on the same disk.
Anyone go this working? And if so, how did you work your magic?
I have attempted the following:
Try 1:
fdisk (DOS) make partition for W98 - used first 10Gb of 40Gb disk
Partition Magic 8 to move W98 out 100Mb for /boot
Set BootMagic to boot W98
Install Fedora C2
format /boot, make/format /, and swap in remaining space
write grub to /boot not MBR
add /boot to BootMagic config
RESULT - MBR trashed (??), noting boots, this worked with RH9.
with RH9 this allowed Bootmagic to boot W98 or jump to grub

Try 2:
delete all partitions
install Fedora C2, allocate 10Gb at hda2 for W98
configure grub to boot from floppy with hd0,1 mapped to hd0,0
this fools the W98 install from trashing the MFT of disk-hummm...
RESULT - W98 install fails due to FAT errors, if I don't allow
W98 installer (scandisk) to fix them it won't install, if I let it fix them
the partitions are trashed. Nothing boots. I found this method
on the web.

Try 3:
delete all partitions
fdisk (DOS) make partition for W98 - used first 10Gb of 40Gb disk
Partition Magic 8 to move W98 out 100Mb for /boot
Install Fedora C2
format /boot, make/format /, and swap in remaining space
write grub to MBR
config grub to dual boot, w98 (hda0,0) and FC2 (hda0,2)
RESULT - grup loads and when W98 is selected the W98 splash screen
comes up but, "that's all she wrote". FC2 boots fine.

Is this correct:
The MBR is at address 0 on the disk and is loaded by the BIOS.
The MBR sets up a jump to the bootloader.
Now I get fuzzy, for FC2 the /boot partition replaces the MBR if you allow it to be written there or it just changes the jump to the /boot partition. Inside of /boot is where grub is located. How come grub can not jump to the W98 partition and get the boot started? I am not sure where W98 puts its bootloader.
 
Old 06-02-2004, 09:02 AM   #2
gorb
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Registered: Jun 2004
Posts: 6

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Hi,

I've got some problems with Mandrake 10.0, and a friend pointed me to the following issue of Heise Online (a German magazine)
http://www.heise.de/newsticker/meldung/47847
which tells how Fedora Core 2 (and some other distros) messes up the hardware geometry of the disk during install.

It is however not a major issue, and can be worked around. There was a discussion on the Fedora developer's list, and a summary posting which has all the details as well as the fix:
http://www.redhat.com/archives/fedor.../msg00908.html

Hope this helps!
 
Old 06-02-2004, 01:45 PM   #3
GrumpyGnome
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Registered: May 2004
Location: El Sobrante, CA (the scraps)
Distribution: Fedora, RH, & Slack
Posts: 57

Original Poster
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Thanks gorb,
I've studied the ref's and now think I understand what is wrong. The fix is a little harder. I found that the CHS stuff was a mess. The next problem is what are the correct values? I found the following:
For my disk per WesterDigital - C 16383 H 16 S 63
From my BIOS (auto scan) - C 19158 H 16 S 255
From fdisk via FC2 Rescue CD - C 77545 H 16 S 63

Man what a mess, so I have the number of heads but can't figure out why the BIOS and WesternDigital don't agree? I am going to attempt a reinstall after forcing the BIOS to the WesternDigital numbers and then forcing FC2 to use the WesternDigital numbers. I'll let you know what happens.
Thanks agian.
 
Old 06-02-2004, 07:30 PM   #4
GrumpyGnome
Member
 
Registered: May 2004
Location: El Sobrante, CA (the scraps)
Distribution: Fedora, RH, & Slack
Posts: 57

Original Poster
Rep: Reputation: 15
Many thanks gorb,
All's well that ends well. )))
With the correct info the precedure is trivial. I was not successful at using the repair procedure, but reinstalling was easy.
I did:
W98 fdisk create a 10GB partition
Install W98 (it used the first partition)
Used PartitionMagic to move the W98 partition out 100Mb
Booted the Fedora Rescue CD
fdisk -l /dev/hda
wrote down the cylinders, heads, ans sectors numbers
Installed Fedora C2 using the following at the first prompt:
linux hda=4865,255,63
use the numbers from the fdisk -l /dev/hda

It is very important to use when insatlling FC2.
I found that without it partitions created with PartitionMagic 8 and the FC2 setup collided and overlapped! Data was corrupt and lost as a result. The whole system behaived very screwy.

All beter now.
 
  


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