Ubuntu
systemd package

  1. Bug #1197796
  2. Comment #5

Comment 5 for bug 1197796

Revision history for this message
In , Kay Sievers (kaysievers) wrote :

Btrfs volumes are like NFS or tmpfs, a superblock without any associated
device. The behavior is expected and intentional.

Btrfs volumes might be constructed of many volumes, there cannot be the
concept of *that* device, like the "dumb" filesystems use.

There is no way for the udev API to find out which device is behind
a btrfs volume. Btrfs specific command need to be used to determine that,
no generic interface exists for that task.