I also tried to re-add the "size" values which should not matter. Still no success: part raid.01 --size 250 --onpart hda1 part raid.07 --size 250 --onpart hdb1 #usr part raid.02 --size 6000 --onpart hda2 part raid.08 --size 6000 --onpart hdb2 #var part raid.03 --size 5000 --onpart hda3 part raid.09 --size 5000 --onpart hdb3 #swap part raid.04 --size 2048 --onpart hda5 part raid.10 --size 2048 --onpart hdb5 #/ part raid.05 --size 1000 --onpart hda6 part raid.11 --size 1000 --onpart hdb6 #home part raid.06 --size 1 --grow --onpart hda7 part raid.12 --size 1 --grow --onpart hdb7 # raid /boot --level=1 --device=md0 --fstype=ext3 raid.01 raid.07 raid /usr --level=1 --device=md1 --fstype=ext3 raid.02 raid.08 raid /var --level=1 --device=md2 --fstype=ext3 raid.03 raid.09 raid --level=1 --device=md3 --fstype=swap raid.04 raid.10 raid / --level=1 --device=md4 --fstype=ext3 raid.05 raid.11 raid /home --level=1 --device=md5 --fstype=ext3 raid.06 raid.12