Thanks John. Yeah same I wasn't sure how it would react but just adding a second flash ssd into the disk group, if It still went offline completely or stayed online, did a recync etc.
I was already toying with the idea of making smaller disk groups on each host with their own flash just for the performance gains.
Currently our storage policy is FTT1 and stripe 1, we have 5 hosts on 3 10G switches, I was considering making FTT2 and stripe 2 also, would this improve the io load and time to resync? or make it worse than it already is when things get out of wack?
cheers