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Forum Discussion
Capacity Calculator for XRAID-2?
Can somebody point me to something that will let me compute capacity for my Ultra-6 given number of drives (6), capacity of each (3TB), and degree of redundancy (Dual vs Single)?
Tangentially and, perhaps, the actual agenda: do most people run dual redundancy?
I'm toying with the notion of doing a factory reset and dropping back to single redundancy if it will create enough extra space.... but don't want to do something that is generally considered foolish....
Tangentially and, perhaps, the actual agenda: do most people run dual redundancy?
I'm toying with the notion of doing a factory reset and dropping back to single redundancy if it will create enough extra space.... but don't want to do something that is generally considered foolish....
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- You can use these for calculations:
http://rdconfigurator.netgear.com/raid/index.html
http://ram.kossboss.com/xraid/
It depends on how important your data is (but remember that having raid redundancy is an excuse not to have backups). If you have intentions of expanding your volume, using raid is the best. - For RAID5 it is size * (number of drives - number of redundancy drives)
So very roughly:
3 * (6 - 1) = 15 for single
3 * (6 - 2) = 12 for dual
Actual shown amounts will be less, as the OS takes space and the Tib / TB difference.
If you were to use different drive sizes across the drive set, then using the RAID calculators in the previous post would be your best bet. - I use single redundancy, but maintain multiple backups of all my data. My overall thinking is that since I will have backups anyway, I might as well use RAID-5 and get some more capacity.
You can switch to dual-redundancy if you have an empty slot. But if all are filled you would need to do a factory reset. That would destroy all data, you'd need to restore from backup.
There is an 8 TiB growth limit (starting from initial install or last factory reset). Depending on where you started, you might not be able to reach the full capacity w/o a factory reset.
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