I have installed OMV version 4.1.22-1 (Arrakis).
Faced the following problem.
After one of my 2000Tb disks included in BTRFS RAID1 began to demonstrate a large number of SMART errors, I removed it from the array and connected a 2000Tb partition on the new 4000Tb disk using standard btrfs tool. After that, the new array is perfectly mounted and works, but it seems that OMV considers it to be unmounted and this leads to the following error when trying to apply any changes to the settings:ApplyChanges.png:
Some commands outputs in attachments.
Help me please to apply changes. If necessary, I am ready to provide additional information.