Currently Being ModeratedMay 4, 2013 1:21 AM (in response to Christiaan)
What RAID level do you recommend?
The choice of RAID format depends on many factors that likely can't be answered directly - there are too many variables based on your own usage and expectations.
If you're looking to use it for backups then you probably want some kind of protected storage, which likely means either RAID 5 or RAID 10. Of the two, RAID 10 will have better throughput, but RAID 5 will give you more usable capactiy (about 2.7TB vs. ≈ 2TB).
Since your primary goal isn't likely to be speed (you'll be throttled by the network bandwidth), I'd be inclined to go with the RAID 5, but there are other considerations, especially if your data usage is highly dynamic (which causes Time Machine backups to take up more space since it saves more revisions of various files).