0XCRDV Dell 3.84TB SAS 2.5in 12G Solid State Drive (SSD)
[XCRDV,PX05SRB384Y,400-AMCT]

5 of 5 Stars This is an SSD drive with SAS type connection. On a raid array , all hard disks must have the same size, or bigger. If not, it won't allow you to put it as part of the raid. And when you make it work, everything will work as the slowest of everything. Has experienced that you also cannot mix SATA and SAS hard drives. The drive is pricey but the IOPS performance adequately covers for any disappointment and second-thoughts.