It's too bad that the SAS 12Gbit is already a bit late and will immediately be bandwidth limited with SSD storage units. The Standards Committee behind the development should have aimed higher than just doubling the speed time and time again. Due to the 8b10b signaling SAS/SATA 6.0Gbit is really limited to around 520MB/s, which most of the current flagship drives from all manufacturers have reached. The flash memory chips could easily handle much higher data rate as shown with the PCIe SSD cards. Excluding reading from/writing to cache, 3.0Gbit signaling is still sufficient for any current hard drive.