Why are LVM2 commands, such as vgscan, taking a very long time to complete?

Release Found: Red Hat Enterprise Linux 4 and later

Scanning logical volumes with commands such as vgscan and lvscan will scan all disks for LVM information. This information is contained in meta-data areas (MDAs). By default, every physical volume contains an MDA. It is important to have multiple copies of an MDA for redundancy, and for most c...