not quite enough info but almost.....
1) what drive is bios booting to? which drive as which system on it?
2) are they both IDE or SCSI? I am guessing by the size they may be IDE
3) Since you are doing a post, are you using RH rescue cd mode to boot into linux?
4) IF SO, can you post your /etc/fstab and if windows is NOT mounted by this file, can you tell us your windows partitons
heres my tut that may help
http://www.linuxquestions.org/questi...hreadid=237511
5) then have a go at your grub file and if fail, post it please