what is the best way to relate actual volumes on the windows host to the symmetrix device if I want to increase the volume size.

The host has lot of drive lettered volumes on it which has got the storage from DMX. In the disk management I clearly see that most of the volumes are below 1% or something where I need to increase the space, what is the best way to correlate to symmetrix devices... where the actual action should be done. In power path I can see the LUN numbers. My question is to how to relate which volume relates what device in symmetrix side?