Two Words About LVM And SANs

• LVM also solves the problem of changing device discovery order in a SAN - each device that belongs to a vg has a signature written onto it. Thus, when the system boots, it discovers the vg-s using these signatures, no matter the order of booting the devices.
• The names of the device files associated with the logical volumes remain fixed, making it easy to shuffle around RAIDs in the SAN.

Originally written by guy keren