SAS Hard drive
Remember SCSI? Reliable, fast, long lasting drives that you could count on keeping your server running. Meet the next
generation of SCSI, Serial Attached SCSI, or SAS for short, with even more performance enhancements than the previous
generation. No more terminators either!  You can now chain up to 65,535 devices through expanders, rather than the old 8 or
16 unit limitations, and data transfer rates are incredible, with current versions running at 3 or 6 Gbit/s, and cables up to 10
meters can be used.
Most people coming to this site will most likely be looking for SAS RAID controllers, as some higher end motherboards are
already starting to ship with SAS controllers built in.  A word of warning: when selecting a controller, be sure to pay close
attention to the bus, as they come in PCI, PIC-e, and PCI-x configurations. 
The top brands at the best prices for Serial Attached SCSI (SAS) Controllers