Error 18

[Nicolas Petitjean]

Hello, 

I'm Nicolas PETITJEAN, BELGIUM.
(Dell Computer: pentium 4, 1.6Ghz, 256 MbRam, 40 Gb HD)

I'm using Grub version 0.93 which was given & installed from RedHat9.0 (3 or 4 
months ago) and it worked very well with my 2 Operating systems ( Linux 
RH9.0:10Gb & WindowsXP:30Gb) until last Thursday. 

Since that day I'm not able to boot under WindowsXP anymore. I've always got 
that error message:
"Booting 'DOS'
 
 rootnoverify (hd0,1)
 chainloader +1

 Error 18: Selected cylinder exceeds maximum supported by BIOS

 Press any key to continue ... "

But I'm still able to boot under Linux RH9.0. I've got some error messages due 
to attempts of mounting the WindowsXP partition, but Linux work as usual.

The problem is that I would like to have  my data written on the WindowsXP 
partition back ( if it's possible). I would be even happier if I could once 
again boot under WindowsXP.

I'm sorry to bother you with this problem once again; I've seen that this 
problem has been answered at least twice, but I don't really understand what I 
have to do. I would be happy if the solution is not too complicated ( I'm that 
clever in computer science).

I've read that this might be a BIOS problem: Changing "auto" to "large" (or 
something like that) for HD in the BIOS configuration. But I can only choose 
"auto" or "off" (nothing else) in my BIOS configuration (nothing else).
I feel that this problem doesn't come from that, because Grub worked perfectly 
for nearly  4 months and I haven't change anything in my BIOS configuration 
since that. 
 
I don't know where the problem come from and why it suddenly appeared.

Excuse my poor english, I hope you'll understand quite everything
 
Thanks everyone 

nicolas

PS: here is some additionnal information (it may help)
"grub>root (hd0,0)" gives "Filesystem type is ext2fs, partition type 0x83"
"grub>root (hd0,1)" gives "Error 18: Selected cylinder exceeds maximum 
supported by BIOS"
"grub>root (hd0,2)" gives "Filesystem type unknown, partition type 0x5"
"grub>root (hd0,3)" gives "Filesystem type is ext2fs, partition type 0x83"
"grub>root (hd0,4)" gives "Filesystem type unknown, partition type 0x82"
"grub>root (hd0,5)" gives "Filesystem type is ext2fs, partition type 0x83"

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