I digged a little bit further into the issue. If I use a root partition with only 2000G (which gets used in a software raid-1) the grub installation works perfectly. It seems there is a problem when using high partition sizes. The filesystem is ext3.
I digged a little bit further into the issue. If I use a root partition with only 2000G (which gets used in a software raid-1) the grub installation works perfectly. It seems there is a problem when using high partition sizes. The filesystem is ext3.