I have encountered this issue when I installed the released mageia. I think I had a similar issue with Ubuntu. No such issue with Fedora, Centos or Scientific Linux.
I have 3 1TB sata hard disks The first disk has xosl boot loader Free Dos gentoo FC15 The second disk has Mageia Scientific Linux Centos The third disk has eComStation 3.1 (OS/2 Warp 4.5) When I installed it it would give me a boot error. I found out later that grub was not installed properly. The hard disks are installed in the right order. I did notice that xosl sees the reverse order for the 2nd and 3rd disk. When going in fdisk the order is correct. I then booted mageia using grub in Scientific Linux. I installed grub and it worked after that. I did notice when I tell grub to look for the boot it wrongly identified the drive as being the first one when it is actually the second drive. I am puzzled because if there is indeed an error on what the bios returns Scientific Linux and Centos would have screwed up too. Michel Catudal -- For OS/2 and Linux Software visit http://home.comcast.net/~mcatudal
