20378 single SATA drive. Won't mount in fedora, will in gentoo
 

I recently changed from a PDC20378 RAID0 on dmraid, because the dmraid thing is terribly slow.

I changed my bios back to "SATA" mode, and copied the stuff onto one disk - a vfat partition.

It mounts easily under the Gentoo live CD, but when I boot fedora, the /dev/mapper/pdc* stuff is still showing, and when i try to

mount /dev/sdb1 /mnt/sdb1, it says that the device is already mounted or is busy.

Any ideas?