Odd. I used to use the ASUS P4C800-E and also used the Abit IC7 MAX (both 865 chipset boards, and neither gave me a problem with SATA. I agree it is better to be safe than sorry, which is why i keep a Floppy drive in my closet and a PS/2 keyboard in a drawer. Worst case scenario is you order the SATA optical drive and it doesn't work and you return it (or make a diskette).
The way I should have explained my thoughts on his question about installing XP from a SATA optical drive is that there probably won't be a problem, but he should check the board before he buys to make sure. Even good companies put out some budget boards that cut corners, which is why I gave my example of the ASUS board with the ATI northbridge and the ULI southbridge.
I didn't expect problems from an ASUS board either. That's why, for the months I used it, I had to install XP to a 40 gig IDE and use the SATA as the second drive. The bios recognized the SATA drive, it just would not allow it to be set as the boot device without drivers being installed when Windows asked for third party SCSI or RAID drivers.
I've been thinking of SATA DVD myself, but I'll make darn sure a future board allows booting from a SATA optical drive, I won't take it for granted just because the board lists 4 SATA and supports RAID 0 or 1.
I wish I'd found this article at Neoseeker before I bought the board last July. As is, I gave it away this Christmas to a friend who has only IDE, so he'll be okay.
http://www.neoseeker.com/Articles/Hardware/Reviews/asus_p5rd1-v/4.html
Note #2: I was also unable to get Windows installed on our usual Western Digital 120 GB SATA hard drive. Neither the SATA driver disk image provided on the CD, nor anything downloaded off ASUS’ site worked – I would press F6 during the Windows XP setup process, it would ask me for a driver disk, it would find the txtsetup.oem file and list the appropriate drivers, and it would even load the drivers. When it came time to copying the drivers over to the hard drive, the setup process complained that it was unable to find the driver files. I tried three different floppy disks with two different floppy drives. I even made a custom XP installation CD with the SATA drivers integrated into the setup – no dice. I resorted to using a Western Digital 120 GB IDE hard drive as the system drive, and then later installed the WD SATA hard drive for HDTach testing.
Maybe I just got the one ATI chipset board by ASUS that had that problem? I'm looking forward to the RS690 "T" model arriving with all the features, and I want to use a SATA drive for that, but I'll make sure first. This time around, it will be a newer ATI southbridge, so I hope the issues are taken care of. I was planning on getting ASUS's board when it arrives in February.