Can not find that anywhere it seems.
What is the expected performance difference in a storage backend scenario that is heavily parallellized in access (like a SAN, Virtualization host storage etc.) between SAS and SATA, all other things being equal?
I Think it runs down to the impact of NCQ (32 command limit) to the MUCH higher oustanding command limit of SAS discs.
We are considering replacing some discs and have a chance to go for SAS or SATA - all the rest is in place - and I look for an evaluation from a performance point. Please ignore all the other issues (reliability etc.) - I purely wonder about the impact SAS will have on similar specced discs (RPM etc. being equal). The discs we have in mind can be ordered with both connectors and - there is an idea here to use SATA for ap ossibly repurpose later. THe price difference is not really high, but it made me wonder about the performance impact...