I was about to order a new larger hard drive for my computer when a friend advised that my motherboard was not equiped to use the Serial ATA hard drive that I had in mind.  Also he said that it was not compatable with Acronis Disk Director that I curently have installed.  I knew that Acronis was not compatable with the Vista Beta 2, but did not know that any problem existed  with the SATA drives.  I am aware that  a SATA cable was necessary to instal the drive, but was not aware that would not work with my motherboard Intel D845GERG2--D845GEBV2.  Where do I go from here?

Take a look at this link, it compares 22 different SATA and ultra ATA hard drives.
You should be able to find one you can use.

http://www.tomshardware.com/2005/09/27/round/

If your motherboard doesn't support SATA drives, you can install a controller card to connect to a SATA drive.