Which of the following commands does NOT create a volume?

The command that does not create a volume is xfs_admin. This utility is actually used to administer and manage XFS filesystems, primarily for modifying filesystem parameters or handling various attributes of existing XFS filesystems. It is not involved in the creation of physical volumes, logical volumes, or volume groups.

On the other hand, the commands lvcreate, vgcreate, and pvcreate are all related to volume management in the Logical Volume Management (LVM) system:

• lvcreate is used specifically to create logical volumes from an existing volume group.
• vgcreate is utilized to create a volume group from one or more physical volumes.
• pvcreate initializes a physical volume to be used by LVM.

Each of these commands plays a role in volume management, making xfs_admin the correct choice as it does not perform any function related to creating volumes.