Disclaimer: I've never used FreeNAS or any type of RAID before, so this is a first.
I've decided to build a media server in my new apartment. I'm going to be going with a total 10TB of space (6x2TB discs in a RAID 5, unless I get recommendations to use another RAID). I've also decided to go with FreeNAS on a recommendation of a friend. Here are some of my issues regarding this setup:
Seeing as buying 6 2TB drives is quite a bit of money, I was wondering how hard it would be to say start with 3 discs, wait until they are full, then add another disc to the array. Is this even possible with RAID5?
My media is currently on 3 1TB drives (non-RAIDed). How straightforward is it to use FreeNAS to transfer files over? I assume I would have to set up my RAID first, then transfer the old files into it one hard drive at a time, right?
Also, how would the above differ if I was using RAIDZ (I'm not quite sure how easy it is to set up)