I just tried my first install on a box with a Mylex Acceleraid 200 controller. The Mylex docs say the driver supports partitions p1 - p7, i.e. /dev/rd/c0d0p1 through /dev/rd/c0d0p7. I tried to install with: 256mb / 256mb swap 256mb /tmp 2000mb /usr <remainder> /var This is only 5 partitions, yet disk druid created them as /dev/rd/c0d0p1 /dev/rd/c0d0p5 /dev/rd/c0d0p6 /dev/rd/c0d0p7 /dev/rd/c0d0p8 I don't know why disk druid likes to create just 1 primary and everything else in an extended partition starting at partition 5, but it breaks the mylex raid driver. This resulted in my /var partition not existing. I was able to get around this by switching to virtual console 2, running fdisk by hand, then rebooting and letting the GUI disk druid use the existing partitions.
This issue has been assigned to a developer for further action.
The fdisk will be available via the GUI in future release to handle this problem more cleanly.