storage upgrade in a replication cluster

All, I would appreciate some valuable ideas from you all. I have a replication setup with 1 master and 4 slaves, I am short on disk space on all the 5 servers so I will move to another partition (SAN). What is, according to you, the smoothest way to move all 5 servers from one partition to an

storage upgrade in a replication cluster

All, I would appreciate some valuable ideas from you all. I have a replication setup with 1 master and 4 slaves, I am short on disk space on all the 5 servers so I will move to another partition (SAN). What is, according to you, the smoothest way to move all 5 servers from one partition to an