Administrator's guide Explanantion

Hello everyone,

Can someone explain me the note on Administrator guide book on chapter:"perform manual disaster recovery of a local backup exec server" there is a

note:  If you are using a disk storage device to recover the local Backup Exec server, do not include the original disk storage device. If you cannot avoid restoring it, you will need to ensure that the disk storage device being used for the recovery does not conflict with the original disk storage device location.

I really appreciate if someone will help me understand with examples

Thank you