choose a rear connector type

Analyze the use of the rear connector and chose a suitable type, for the PFC and SPEC.

As alternative to eSata there are:
Sata II (3Gbit/s widely used in computers nowadays)
Sata III (6Gbit/s that could become the future standard in computers)

These are not so robust as eSata but for communication between neighbour boards should be good enough.

For eSata it is hard to find cable shorter than 0.5m, whereas for Sata it is possible to find 0.2m cables.