RAID-5/6 = Erasure Code; bad for SSDs
One should >>never<< use any form of "Erasure Codes" on SSDs because of the massive write-amplification involved. Whatever the endurance of the SSD is, Erasure Coding will take away 60-80%. We used to call it the "RAID-5(6) Write Penalty"
Also, lots of vendor B.S. out there (Pivot3 for example) hyping their RAID-5/6 implementations while re-naming them as "Erasure Coding". Ohhhhhh...sounds so much sexier than "RAID-5".