RAC & Failsafe :: Test Environment - SAN Migration?

We have a RAC in a test environment.It's 2 nodes connecting to an IBM DS3512. The DS3512 has one pool of 8 hard disks (RAID10) which has been then sliced into logical drives:

2 x 1GB
then
2 * 400GB

I have been tasked with changing the current configuration as follow:

2 pools of 4HDs in a RAID10 configuration

Then from the first pool:
2 * 1GB
1 * 398GB

from 2nd pool:
1 * 400GB

What I intend to do:
1) shutdown
SQL> shutdown immediate;
./srvctl crs stop
2) backup
dd if=votingdisk of=voting_disk_backup
I already got backups of OCR in $CRS_HOME/cdata/crs/
3) Perform changes on SAN
4) recreate ocfs2 partitions
5) mount the disks to their folder.
6) recovery
recover voting from backup
recover ocr from backup
7) Turn service on again
./srvctl crs start
SQL> startup;

Would this scenario work. There can be some glitches like the disk names changing after the reconfiguration but I only need to modify fstab for that.