Shifting Tru64Unix OS from standalone to RAID Disks

Hi All,


 I have 1x ES40 Server with Tru64Unix 5.1A installed in single disk 9.1
GB
Now I'm planning to upgrade this OS to 5.1 B-2 in new set of RAID Disks
for more protection. 
New OS has to work with the existing oracle database & application.


Can you please suggest me the easy & best way to upgrade the OS to 5.1 B
to New raid disk. 

A.  Is it possible to restore btextract of OS from 9GBDisk to new RAID
Disks. Later run GENVMUNIX to re-configure the Kernel. 
B. Then upgrade OS from 5.1A to 5.1B-2

OR

Another Option leave the existing OS, install  fresh OS 5.1B-2 directly
in new disk .. 
Is there any procedure to relink the Oracle binaries and database .....


Many Thanks in Advance
Vimal