Storage Suggestions Please?

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Nov 22, 2011
hi all,

These are my system specs:
  • FreeNAS 8.0.2 RELEASE amd64 (8288)
  • Gigabyte G41M-Combo with 4 x SATA 3 GB/s
  • 2 x 4GB DDR3 RAM
  • 1 x SiL 1334 4-ports SATA PCI-card
  • 3 x 2TB WD Caviar Green
  • 1 x 1TB Seagate
  • 3 x 320GB Seagate

I'm currently running my FreeNAS box with a JBOD setup on a ZFS Striped volume. And being an absolutely newbie - I've just realized that I do not have any disk fault tolerance.

I am thinking of re-doing my storage setup and would appreciate some input/suggestion on my proposed setup:

3 x 2TB in a RAIDZ1 volume giving me approx 4TB of storage
3 x 320GB in a RAIDZ1 volume giving me approx 640GB storage
1 x 1TB as a ZFS spare in case one of my 320GB drives fail and I'm able to replace it without any data loss.

  1. Given the drives I have, would this setup give me the highest amount of storage available while allowing single drive failure without data loss?
  2. Am I correct in understanding that if one of my 320GB drives fail - I can replace it with my 1TB drive without any drive failure?
  3. Any other comments or suggestions is very much appreciated, thanks in advance!


Resident Grinch
May 29, 2011
1) No. That solution would be 3 x 320GB, 1 x 1TB in a RAIDZ1 giving you 960GB. This essentially uses the 1TB as a 320GB drive.

2) Not if you do what I suggest in 1). Otherwise yes.
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