mojave man page for vgscan

VGSCAN(8)                                                     System Manager's Manual                                                    VGSCAN(8)

NAME
       vgscan - scan all disks for volume groups and rebuild caches

SYNOPSIS
       vgscan [-d|--debug] [-h|-?|--help] [--ignorelockingfailure] [--mknodes] [-P|--partial] [-v|--verbose]

DESCRIPTION
       vgscan  scans all SCSI, (E)IDE disks, multiple devices and a bunch of other disk devices in the system looking for LVM physical volumes and
       volume groups.  Define a filter in lvm.conf(5) to restrict the scan to avoid a CD ROM, for example.

       In LVM2, vgscans take place automatically; but you might still need to run one explicitly after changing hardware.

OPTIONS
       See lvm for common options.

       --mknodes
              Also checks the LVM special files in /dev that are needed for active logical volumes and creates any missing ones and removes unused
              ones.

SEE ALSO
       lvm(8), vgcreate(8), vgchange(8)

Sistina Software UK                                      LVM TOOLS 2.02.95(2) (2012-03-06)                                               VGSCAN(8)