root filesystem is not BTRFS. During Rockstor installation, you must select BTRFS instead of LVM and other options for root filesystem. Please re-install Rockstor properly.' - Support - Rockstor Community Forum
Install Ubuntu 18.04 Server on btrfs - work-work.work
Split Fedora 33 BTRFS in two disks - Ask Fedora
How to Fix "can't read superblock" Error on Linux (ext4 & Btrfs)
Linux 5.14 SSD Benchmarks With Btrfs vs. EXT4 vs. F2FS vs. XFS - Phoronix
HowTo] portable manjaro (1)USB with XFCE, btrfs - Tutorials - Manjaro Linux Forum
Multi-device and RAID1 with btrfs | There and back again
BTRFS' pooling with many USB drives, where are the files go? : r/btrfs
How to create an external selfhealing btrfs USB HDD RAID 1 array? - Ask Ubuntu