On 24 Jul 2014, at 18:32, James Harper <james@ejbdigital.com.au> wrote:

What brand/model are the SSD's? We just had two Samsung SSD's fail pretty much simultaneously (within the replacement window, so it took the machine down). Presumably it was wearout, although all post-mortem testing we did shows no problems with them and the limited SMART capability they possessed said everything was fine.

They are Plextor M5 Pro drives. The controller doesn't even seem to pass SMART through, other than to query on it's own and give either "OK" or not