Drive/Folder pool - always write to specific drive (unless full)

Hello all,

Setting up drive pooling on fresh OMV5 install, picking between "mergerfs folders" or "Union Filesystems" plugins. Can either of these always write to a specific drive(/folder) unless that drive(/folder) is full?

Looking for something like write caching - focus my writes on an SSD that's part of the drive pool, run a script to move it off cache regularly. Didn't see anything that looked like this in "Create policy" for either plugin - perhaps there's some configurable way to do this in the underlying (FUSE?) filesystem?

Alternatively - is SSD write caching available in OMV, and I'm a doofus who couldn't find it?

Thanks in advance!

Moss

Quote from raulfg3

yes, revise options (policies) in the plugin.

https://github.com/trapexit/mergerfs

Hi raulfg3,

Thanks for quick response! I did check policies in both plugins before posting - "Didn't see anything that looked like this in "Create policy" for either plugin."

I see variants on these policies:

- Existing path

- First found

- Least free space

- Least used space

- Most free space

- Newest file

- Random

None of these seem to apply to prioritizing a specific drive (ex. 'always write to dev-disk-by-label-example'). Am I missing something in the plugins?

I will look in depth at the mergerfs documentation.

Thanks,

Moss