So ask yourself: in a home server, just what does RAID give me? Are
you really bottlenecked for speed in a way that RAID will improve?
Perhaps RAID can help with High Availability (and perhaps not) -- is
that what you are hoping for? Just don't think of it as backup.

--

Hmm, I was looking at it more as a High Availability than backup. I already have a 2TB external disk for backup.

at least my experience so far with the current Caviar Blue 750G has been good (5+ years, no problems), The replacement is a Caviar Red so in theory it should be more reliable, maybe I can get away by not using a RAID ( dang, I really wanted to practice with one).

I guess four partitions (OS1, replacement OS1, swap and data) where data=ZFS system instead of ext4 should be more than enough. On the other hand, do I REALLY need ECC memory to make ZFS work as this article suggests? (http://www.firewing1.com/howtos/fedora-20/installing-zfs-and-setting-pool)

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--
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/\_/\
|O O| pepebuho@gmail.com
~~~~ Javier Perez
~~~~ While the night runs
~~~~ toward the day...
m m   Pepebuho watches
      from his high perch.