OI+Napp-it mapped drive question

[crept]

Hello guys, just a quick question.

All of my zfs shares from OI+Napp-it (except one) are reporting strange usage:

I don't think it's a big issue, but it sometimes gets annoying to see 4.75TB/4.75TB free when in fact there is some usage.

The backup folder is reporting 4.75TB/5.03TB which seems right.

Any ideas?

Thanks

 

[_Gea]

This is probably because of the idea of a ZFS storage pool where you can create filesystems (similar to partitions on other systems).
Each filesystem is independant but can grow dynamically up to the whole unused poolsize.

So an increase of one filesystem lowers the available capacity of all others.
The idea is, that you use quotas and reservations to restrict and manage this flexibility.

Ex. The default napp-it reservation on pool level lowers the free capacity of all filesystems by 10% of the poolsize to avoid a overall pool fillrate above 90%

This is completely different to partitions on older filesystems, where you define the size at creation time and this size will never change.