Bratwurst

Looking at Newegg for a bunch of SATA drives. I'm actually going to put together a SAN using 12 of them in a chassis that does RAID 5 with SATA.

So I am looking and I see SATA II and SATA 150. I know what the 150 is, but I havne't seen SATA II before. Can someone explain the difference?

I going to buy 400 GB drives which they I don't see in SATA II anyway, but I just want to try to learn the difference just so I know for the future.

Thanks!

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