Hey everyone - This is my first post on this great forum, although I have referred to it many times for quality info. I am a QA engineer for Cakewalk music, so I plan on giving back to the community down the line with audio topics. Here we go: I have a Mac Pro I got from work and want to set it up right for problem free, redundant operations because I do my personal and work related projects on it and the data is irreplaceable. Here is what I have and how I was planning on doing the setup. Any feedback would be great, because this is my first RAID setup and wanna get it right: Disk 1 = 370GB (OSX and Bootcamp) Disk 2 = 1 TB (Media, samples, project files, etc) Disk 3 = 1 TB (RAID 1 paired with Disc 2) Disc 4 = 1 TB (OS Images and Time machine backup for Disc 1) External HD = 1 TB (Raid 1 Paired with Disc 4) *All RAID will be done through Disc utility My specific concerns: 1. Will having Disc 2 and 3 as a RAID 1 Pair decrease the disc performance? I will be using disc 2 to stream audio samples into my softsynths and was wondering what kinda of negative impact RAID 1 has on streaming. 2. Can you setup an external HD as a RAID 1 pair with an internal drive? I will not be streaming any audio off Disc 4 so performance is not an issue. It would just be nice to have a redundant backup of the drive with all my images and Time machine data. Any input would be great! Thanks in advance.