Yes.
The CREATE directive in mdadm.conf sets system (default) parameters for newly created RAID arrays and corresponding device nodes in the /dev directory.
For example, it specifies:
- The owner (owner) and the group (group) to which the device will belong.
- The access mode (mode), in this case
0660(rw-rw----). - Whether to automatically create devices (auto=yes).
Thus, if you do not explicitly pass these parameters in the mdadm --create command when creating a new RAID array, then mdadm will take them from the CREATE line in the configuration file.