i see, makes sense. You will need to figure what LUNs belong to what application/volume group and move them at once. Let's say i have an Oracle database that uses LVM (logical volume manager). You will need to figure out what LUNs make up that volume group, shutdown the database, unmount the file system, export volume group from the old server, move LUNs from old storage group to new storage group, rescan/reboot new server, import volume group on the new server, mount file system, start database.
what are the Steps needs to be taken before moving the luns from one storage group to other without any data loss or server panics?
Steps needs to be taken before moving the luns from one storage group to other 
without any data loss or server panics