Mount backup positional parameter

The positional parameters immediately follow the mount backup command and precede the optional parameters.

The following positional parameters specify the objects to mount:

component name[(<object-id>)]=mount point root dir[,component name=mount point root dir]

component name[(<object-id>)]: Specify the backup of a local SQL Server database or storage group.
mount point base dir: Specify the absolute path to the directory where the snapshots are going to be exposed as mount point directories. The directory must be empty. If not empty, an error is reported.

The list must contain all non-qualified objects or all qualified objects. The list cannot contain a combination of non-qualified objects and qualified objects. Specify the list using the following syntax:

mount backup object-1[(object-1-id)]= mount-point-1[,object-2[(object-2-id)]
=mount-point-2...]