VGSCAN(8) System Manager's Manual VGSCAN(8)
vgscan - scan all disks for volume groups and rebuild caches
vgscan [-d/--debug] [-h/-?/--help] [--ignorelockingfailure] [--mknodes]
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(8) 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.
See lvm for common options.
Also checks the LVM special files in /dev that are needed for
active logical volumes and creates any missing ones and removes
lvm(8), vgcreate(8), vgchange(8)
Sistina Software UK LVM TOOLS VGSCAN(8)