Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

dubAdub

macrumors member
Mar 31, 2011
89
0
Bray, Ireland
The blurb here says "Configure as a RAID 0, RAID 1, mixed partition, or concatenated volume for customizable speed and protection".

Raid 1 & time machine would be the most reliable option but you'd only have 2TB disk.

Raid 0 + time machine would give you the most back-up space but be vulnerable to either disk failing.

Two separate disks + time machine is probably the best trade-off.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.