Great info Warwick, but I think you have a bit of confusion about Infiniband
SFF-8470 Infiniband cables are used for muti-lane SATA/SAS in the same way as Mini-SAS SFC-80800 cables, but have a completely different connector as you discovered:
http://www.computercablesource.com/N.../sas-ll_xl.jpg
There are also 2 different variants with securing latches or thumbscrews which are not interoperable. These type of cables are also used for 10Gb CX4 and Infiniband networking.
SFF-8470 Infiniband connectors are used on some Highpoint and ProAvio multi-lane SATA storage products amongst others, but Mini-SAS SFC-80800 has become more common recently.
snip snip
............
All The Best
Dave Barnard
cinedigital
London, UK