raidz2 hard drive calculator

[David Fernando]

Hi everyone,
I am wondering where I can find a raidz2 calculator? or is using a raid 5 calculator good/accurate?
thanks
David

 

[headconnect]

I would think that RAID-6 has more similarity with raidz2 and RAID-5 should be (roughly, remember swap sizes and such) equivalent to raidz1.
For simplicity, raidz2 will give you ((NumberOfDrives)-2)x(SpaceOfSmallestDisk)=UnformattedStorage. raidz1 would give you the same calculation, just -1 drive instead of two (raidz1 uses one drive for parity, raidz2 mirrors parity as far as i remember)