I plan to buy Adaptec RAID controller in my workstation.
I have 8i ports with 2xSFF8643. So I need to use 2 cables SFF8643 => 4xSATA (shown on image).
But I can see on image 1 additional connector (latest on the right).


What is it? How should be used?

1 Answer 1


The picture isn't working at the moment, but even without it I can tell that this additional connector is a sideband connector. Basically, MiniSAS (SFF-8643) includes additional SGPIO and I2C lines, that could be connected to an enclosure and would allow controller to read enclosure status and control its indicators. If you don't have a compatible enclosure it could be just left hanging around with no collateral damage.

  • I will go to read about SGPIO and I2C ))
    – Maxim
    Mar 1, 2017 at 21:38

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.