SAN Storage Migration Exchange 2010 DAG

I have a question related to SAN storage migration in Exchange 2010 DAG environment. I have Exchange 2010 DAG with 3 members, 2 in the production and 1 in DR site. Two production servers have active and passive copies of each other’s DBs and DR server have passive copies of all DBs (second copy). I plan to migrate SAN storage (HP EVA) to a new EVA in the production and then in DR using following steps;

1.       Create EVA CA replication sets (controller A and B)
2.       Activate database copies of all 3 databases on DR server
3.       Dismount two public DBs seated on NY servers
4.       Dismount recovery DB
5.       Suspend DB copies to production servers
6.       Export all disks of active/passive copies on prod servers
7.       Un-present LUNs from production EVA
8.       Reboot servers (one at a time)
9.       Perform CA failover (failover/suspend) from prod. EVA
10.   Scan disks from OS
11.   Import all disks on Prod. servers
12.   Resume DB copies from DR to prod. servers
13.   Once everything is in synch, activate database copies of all 3 databases on Prod servers
14.   Mount Public DBs
15.   Delete DR groups from old SAN
16.   Perform the same steps in DR

I am not concern about SAN data migration steps because I have performed these steps before on Exchange 2010, my concern is if SAN block level storage migration on Exchange 2010 is not supported by Microsoft? Somebody told me that the only methodology supported by MS is replicating databases using Exchange native replication. This methodology will be much slower than SAN block migration. Also, if there are any issues during Exchange native database replication we would have to go to backups, versus just reverting back to SAN LUNs on old SAN. Could somebody please confirm that it is correct that Microsoft does not support any other type of migration except Exchange native DB replication? I understand that MS would not provide tech support but is SAN block migration viable and supported option? 

Thanks!