Hi,
I'm going for a new small NAS setup with 2 mirrored data disks of 1,5TB.
Looking at FreeNAS in a VM guest (to test with) I found that the capacity of a ZFS mirror is only half of what you would expect, meaning only 750GB instead of 1,5TB.
When you create a zpool from CLI in FreeNAS, with:
# zpool create -m /mnt/data data mirror ada1 ada2
then you do get 1,5TB of usable capacity on the mirror.
Where does FreeNAS use the extra (50%) capacity for? Snapshots? How do you bypass this behavior? Creating ZFS pools from CLI does not reflect in the GUI, so they're not usable...
Thanks for your help!
Bob
I'm going for a new small NAS setup with 2 mirrored data disks of 1,5TB.
Looking at FreeNAS in a VM guest (to test with) I found that the capacity of a ZFS mirror is only half of what you would expect, meaning only 750GB instead of 1,5TB.
When you create a zpool from CLI in FreeNAS, with:
# zpool create -m /mnt/data data mirror ada1 ada2
then you do get 1,5TB of usable capacity on the mirror.
Where does FreeNAS use the extra (50%) capacity for? Snapshots? How do you bypass this behavior? Creating ZFS pools from CLI does not reflect in the GUI, so they're not usable...
Thanks for your help!
Bob