lvscan
scans all known volume groups or all supported LVM block devices
in the system for defined logical volumes.
OPTIONS
See lvm for common options.
--all
Include information in the output about internal Logical Volumes that
are components of normally-accessible Logical Volumes, such as mirrors,
but which are not independently accessible (e.g. not mountable).
For example, after creating a mirror using 'lvcreate -m1 --mirrorlog disk',
this option will reveal three internal Logical Volumes, with suffixes
mimage_0, mimage_1, and mlog.
-b, --blockdevice
Adds the device major and minor numbers to the display
of each logical volume.