My SpeedFreak SAN is now 7-8 years old when it comes to motherboard and SSDs. I recently upgraded to 32 Gigabit/s fiber channel and its great and I don't foresee any additional upgrade soon apart from perhaps getting a 32 Gigabit FC switch if prices comes down.

However my SSD disk situation needs to be addressed as SMART values on 4-5 drives (out of 15) is looking not great. Its not a catastrophe if the raid fails, its running my vmware workloads but all VMs have nightly backups on external NAS. 

But I feel like i should explore the SAS SSD path as the consumer drive market is crazy expensive at the moment and I don't want to wait until I have failing drives. 

Has anyone really gone full SAS SSDs with perhaps 24G or at least 12G drives? As I will be running a RAID controller (AVAGO MegaRAID SAS 9480-8i8e) i have to rely on multipath working on the controller not only for redundancy but also for some speed :) 

I have dual controllers in my JBOD enclosure, with dual links per controller so my bottleneck will really be my FC links maxing out at 64 Gigabit/s - 6-7 GB/s is my estimate. 

However I wont have 15 SAS SSDs, have not decided yet and trying to find the sweet-spot when it comes to redundancy and performance. I might do two datastores/LUNS on two separate RAID-6 VGs to spread the risk allowing me to place things like DNS servers on one LUN each (today I only have one datastore of the SSD type, but others for spinning rust) 

Anyone having been in a similar position thinking about SAS SSDs and can share some insight? 

Dipping my toes into SAS 12-24Gb/s SSDs...