You probably do not want an eSATA connection to an external Raid. Likely you want either a 8088 or 8087 multilane connector, at least if you like speed.
That would be nice, but won't work for me because my new computer has to be a laptop. At least they won't work as far as I'm aware. Thank you though
Here is the problem with eSATA: An aid0 inside a single external enclosure that's connected via a single eSATA 3.0 Gbps connection will be barely any faster than a single fast disk - in other words, the physical transfer speed of three or more hard drives in aid0 will be greater than that single eSATA 3.0 Gbps connection can handle. However, most laptop internal hard drives can only produce transfer rates that are about half those of their desktop counterparts.