jose: Glad to hear you got it working. After a number of Asus boards I must say that I have absolutely no faith in Asus SATA ability.
Off-topic history: Had an A8V Deluxe with 4 SATA ports, two on a SiL controller and two on VIA. If I ran one pair of disks in RAID1 on either controller it worked fine, but as soon as I connected two pairs of RAID1 disks, one on each controller, the system would freeze for five seconds every fifteen seconds, and the event log would be full of timeouts. It wasn't possible to format the drives either. Tried this on two boards whit latest BIOS and both showed the same problem.
On-topic RAID problem: Got the P5W and was looking forward to being able to run two pairs of RAID1 drives. I connected my system disk (36GB Raptor) to the SATA1 port on the ICH7, two disks (320GB Barracuda) on port 3 and 4 and intended to connect the last two drives (120GB Barracuda) to the SiL controller, but wanted the OS up and running before I did that.
Installed Windows, and no problem finding the disks on the ICH7. Problem came when I installed the EZ-Raid backup software - Windows bluescreened during the install and then went into a boot loop. I tried everything - flashed the BIOS to 1101, installed the EZ-Raid software *before any other drivers *after all other drivers *before SP2 *after SP2 *with drives connected *without drives connected *without any other expansion cards in the system except graphics, nothing helped. Since every try required a Windows reinstallation it was pretty annoying. I even reflashed the SiL controller with their latest firmware and ran the SteelVine management program instead of Asus EZ-Raid, same thing, bluescreen during install and then boot loop. However, I now saw that it was IaStor.sys that got the bluescreen. Using Intels latest ICH7 and 975X drivers didn't help.
Finally I thought I found the solution: Install the system disk on the JMicron controller, that way I could install the OS without having to install the IaStor.sys for the ICH7 (and I could get a third 320GB, put it on SATA1 and run RAID5 on the ICH7). When Windows was up and running, I then installed the SteelVine software without hickups, and then installed the ICH7 driver and utility. The system was stable! ...until I connected the first disk to the SiL controller. VERY slow bootup, login, then blue screen of death.
I was now fed up with this, realized the MB wouldn't cut it and got a cheap 2-port SATA PCI card that I connected the 120GB drives to. That didn't work either - not enought headroom to initialize the bootrom on the JMicron controller then. No JMicron, no system drive.
I'm now going to give all Asus controllers the boot, get a proper RAID card - the AMCC 3Ware 9590 12-port, and connet all SATA drives to that and disable all the built-in crap. However, with my luck Asus has probably manage to f***k up the PCI-E implementation as well and the 9590, which is a x4 PCI-E card, probably won't work in the second PCI-E 16x slot, although it should.
I never should have given up on my old Commodore 64 with the wonderful floppy drive...
The moral of this story is: If you want an Asus MB, get one that has at least three more SATA ports than you will ever use, as that is the "Asus factor" headroom you need to set aside.
Best regards
/Andreas
Note: Asus now seems to have removed 1101 from their BIOS updates