SAN Storage Persistently acquires /dev/sda label

I am having my Fiber connected SAN to a host whose specific partitions (say /dev/sda4, 5 and 6) are for my Guest machines.

The guests cant access the partitions every time I attach the SAN storage because the storage partitions(LUNs) takes the first labels(say from /dev/sda to /dev/sde) resulting to the host device name adjusting to another name say /dev/sdf(1,2,..6).

How can I fix this prior to implementation of Multipathing?