We are building up some new servers and want to use 12Gbps SAS3 drives alongside some SATA 6Gbps Enterprise SSD's attached to a single Supermicro SAS3 backplane using an LSI SAS3 Expander and LSI / Broadcom 9361-8i RAID Controller with CacheCade Pro 2.0.

RAID Config will be as follows

* Array 1: 2 x SATA3 SSDs RAID1
* Array 2: 2 x SATA3 SSDs RAID1
* Array 3: 6 x SAS3 HDDs RAID10
* CacheCade Pro 2.0 attached to Array 3: 2 x SATA3 SSDs

**Question 1:** Will 12Gbps and 6Gbps drives play nicely on the same 12gpbs expander and controller without compromising performance?

**Question 2:** Should I use interposers on the SATA3 SSDs to achieve the RAID config outlined above?