4 x 3 TiB drives 4.17 TiB used 957.04 GiB left is this correct?

[kiwilinux]

I have 4 x 3 (2.73)TiB drives in one pool and the pool has used 4.17 TiB but the remaining 957.04 GiB left. I guess it is if I am using Raid Z2. If someone can confirm that woud be great.

Thanks in advance

 

[jgreco]

You would have approximately two disks worth of usable space; 2 * 2.73 ~= 5.46TiB.

4.17TiB + .957TiB = 5.13TiB

RAIDZ is not an exact science, as it merely guarantees a redundancy level, and small blocks will consume more space for parity than you might otherwise expect. It does not appear to be shockingly outside a plausible range.

 

[Johnnie Black]

I find this calculator to be pretty accurate, according to it you should have 5.107TiB usable, 4.17TiB + 0.934TiB = 5.104TiB