So basically one of my LaCie 2big drives went, I contacted them and they sent me a replacement that I hot swapped. I called them up to have them help me install it, but they are saying with El Capitan, Apple removed the ability to create the raid in disk utility. They gave me instructions on how to do it in Terminal, but they said it would wipe out both drives. (Here are the instructions: http://knowledge.lacie.com/articles/en_US/FAQ/007650en?language=en_US&wwwlocale=en-ca) Does anyone know if this is true and if there is anyway I can do this without losing everything? I am currently backing it up to another drive. Just looking for an easier way to do it.