Hi, I'm trying to bring up FC5 on a new system with a 3ware 9550SX and 8 750GB drives. I only have drives connected to the 3ware controller, so I need to be able to boot off the array. FC5 seemed to install okay, but it turns out that the ~5TB data partition was unmountable. The disk had a msdos disk label so the 5TB partition wouldn't work. It sounded like grub can't boot off a GPT labeled disk, so I decided to try out 3ware's new 'boot volume' feature. I created a 5TB volume with a 32GB subvolume for boot. The boot volume shows up as /dev/sda and the make data volume shows up as /dev/sdb. I installed FC5 on this configuration and things seemed to install okay, but on reboot the kernel panics, unable to find the root: "VFS: Unable to mount rootfs on unknown_block(0,0)" I have sda parititoned like this: sda1 125MB boot (ext3) sda2 1874MB swap sda3 30GB / (xfs) grub.conf is booting the kernel with root=/dev/sda3 If I boot from a rescue CD, it finds the root volume just fine and everything seems happy. I've used the XFS '/' on other systems and I have booted from a 3ware without problems, (worked just fine in the initial install on this machine) but this is the first time I have tried the boot volume feature. Any ideas what I might try? --Clem