I haven't tried FC5 yet but there was one oddity I ran into on FC4 installations. When setting up software RAID-1 on two SATA drives the installation constantly failed with a device not ready error. Both drives were on a Promise RAID controller set in Ultra IDE mode. The problem seemed to be due to the disk partitioning information not being updated before the drive was used. I say that because the workaround I finally found was to start a non-RAID install on each drive and abort it after the disk was partition and properly found by the installer. Once both disks were pre-partitioned to the correct sizes, I was able to have the software RAID-1 installation succeed on the SATA drives. Hopefully that glitch has been eliminated from FC5. Jack