The Asus P9X79 Deluxe LGA2011 / X79 motherboard has the following ports:
2 x SATA 6.0 Gb/s (Intel X79)
4 x SATA 3.0 Gb/s (Intel X79)
2 x SATA 6.0 Gb/s (Marvell 9128)
2 x Power eSATA 6.0 Gb/s (ASMedia ASM1061)
In this case I am only using the 4 x SATA 3.0 Gb/s (Intel X79) ports. Initially I thought that only the SATA 3.0 ports would be configurable in a RAID array but during setup I came to realize that all 6 of the Intel ports were configurable in the array. ASUS P9X79 DELUXE LGA 2011 Intel X79 SATA 6Gb/s USB 3.0 ATX Intel Motherboard with UEFI BIOS $379.99 ASUS P9X79 Deluxe Intel LGA 2011 Review
Its my understanding that Haswell will have motherboards with 6 Intel SATA 6G ports off the Z87 chipset as well as some of the other lower-end Intel chipsets for Haswell. Possibly there will be TRIM support in a RAID 0 array as well. The X79 chipset has yet to receive that support but presumably its forthcoming.
said by Mike:
which bios are you running?
UEFI BIOS version 1103
There have been five UEFI / BIOS releases for the Asus P9X79 Deluxe since 1103:
(2012.12.07) BIOS 3203
(2012.10.16) BIOS 3009
(2012.08.14) BIOS 2104
(2012.07.30) BIOS 2002
(2012.06.13) BIOS 1203