$ curl cheat.sh/
 cheat.sheets:vgscan 
# vgscan
# Scan all disks for volume groups.

# Scan all physical volumes for volume groups
vgscan

# Scan all disks for volume groups without updating the cache
vgscan --ignorelockingfailure

# Scan and print the current volume group names without performing any changes
vgscan --readonly

# Run vgscan with verbose output
vgscan --verbose

# Run vgscan with debugging information output
vgscan --debug

# Scan all disks and force a re-read of the metadata
vgscan --mknodes

 tldr:vgscan 
# vgscan
# Scan for volume groups on all supported Logical Volume Manager (LVM) block devices.
# See also `lvm`, `vgchange`.
# More information: <https://manned.org/vgscan>.

# Scan for volume groups and print information about each group found:
sudo vgscan

# Scan for volume groups and add the special files in `/dev`, if they don't already exist, needed to access the logical volumes in the found groups:
sudo vgscan --mknodes

$
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