Help me understand space usage volume/pool

[beneix]

I started receiving a warning that I had reached 80% of the total space for my storage pool.

Meanwhile, the underlying volume is only at 43%.

I need help understanding what action I should take to address this.

[Becker2020]

Hi,

you can change the alert to 90 %.

your Thick-volume use 78, 42 % and your snapshot use 1,53% → pool is over 80% (80,05%)

Why is my storage pool full when there is still free space in my thick volume? | QNAP

[beneix]

Thanks @Becker2020 - that was exactly what I was looking for.

[NA9D]

This is one reason why thin volumes are a little more flexible. They don’t take up the physical space on the drive until they actually need it. So that “empty” space can be used for snapshots, other volumes, etc.

[beneix]

@NA9D is it a straight-forward thing to convert a thick volume to a thin one?

[Becker2020]

No. But i think a thick-volume is better for you.

thin-volume !!!
The size of a thin volume can be greater than that of its parent storage pool. This is called over-allocation.
The pool free space is shared among all thin volumes, and the NAS administrator must take care to ensure there is enough free space in the pool as more data is written to thin volumes. In the event where there is insufficient pool space, thin volumes will enter read-delete or read-only mode until more pool space is available.

What is the difference between a static volume, thin volume, and thick volume? | QNAP

[NA9D]

After having used both thick and thin volumes, I would much rather use thin. Yes, you can over allocate and this is especially easy in QuTS Hero. I am quite over-allocated. But it allows very flexible storage and shared folder operations.

And I found it quite easy to convert. I think there’s an option in storage manager where you select the volume and say “Convert to Thin Volume.”