Howto install fedora 11 to Mac Pro 2008

Fedora 11 can be easily installed to a new internal disk by simply booting from the fedora installation media.
I tried with disks connect to 2 hidden internal sata ports (connect to 2 esata extendor ) but disks can't be found when booting with the installation DVD. If I change the bootable fedora from internal disk 4 to connect with esata 5 or 6, it fails to boot. It can't even be rescued with the DVD unless I reconnect with bay 4 again.

So the extra internal sata5 and sata6 can only be recognized by mac but not fedora 11. Is it a bug with fedora 11 because it does not expect I will use sata5 and sata6?

Note:
The Mac Pro has 1 P-ATA port (for up to two P-ATA devices) and a total of 6 SATA ports, 4 integrated in to the drive bays, and two internal SATA ports that are not connected to drive bays. These extra SATA ports can be put into service through the use of after-market extender cables, for use with internal Optical drives, or to provide eSATA ports with the use of an eSATA bulkhead connector.