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- Dec 8, 2017
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- 442
I have a RAIDZ1 volume with a single vdev of 4 X 6TB drives. As expected, FreeNAS shows 21.8TB for the total size. However, the usable size is reported as 16.9TB. If my math is right, it should be about 18TB (around 3.6*5). What happened here? Is there a TB of overhead that I'm missing unique to ZFS?
Code:
root@freenas:~ # zpool list NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT RaidZ 21.8T 10.4T 11.4T - 33% 47% 1.00x ONLINE /mnt root@freenas:~ # zfs list NAME USED AVAIL REFER MOUNTPOINT RaidZ 8.28T 8.56T 153K /mnt/RaidZ
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