Currently, FTDC metadata stores information about filesystem mounts.
This can be used to determine what devices are used for accessing MongoDB data in the simple case, but can't be used to determine what subset of disks are utilized on systems with software raid or LVM.

Being able to filter what disks contribute to mongod would be incredibly useful, especially on machines with dozens of disks. Storing something similar to lsblk output would greatly help in these scenarios.