I use openmediavault and would like to switch to truenas

[Ivar]

I use openmediavault and would like to switch to truenas. My problem is that I have harddisks in Btrfs file system.
How can I import my 8 harddisks to truenas without losing all files ?

 

[jgreco]

This will sound rough, and, sadly, it is:

If you only have a single machine: Back up all your files, install TrueNAS, reload your files.

If you have two machines: use rsync to copy all your files from OMV to TrueNAS.

There is no easy path here if you have an investment in Btrfs. Btrfs is not supported here.