LVM migration from one SAN storage to another New SAN Box

List, I want to migrate our old SAN storage backend which contains LVMs used for the cloud storage, to a New SAN Storage box. The requirement was to migrate all storage of the old SAN box, which was mounted to the controller node as /dev/sdb and /dev/sdc around total 6TB storage. 80 % full. Then AMC of this box getting over. So what all are the steps to perform the migration of the old storage to new SAN storage . Any hints most welcome Kris