Vijay - RAID restore question

["Vijay Ramnarayan" <vijay ramnarayan intransa com>]

Hi,

I had a Redhat box on which I had configured  Software Mirroring between
two disks using mdadm. 
  
Had to reinstall the OS which I did and now I have both the disks on the
same system.  

How do I configure mdam so that the DATA from at least one disk is not
deleted ? 
If a create a new md0 device will it nor format both the disks ? 

I cannot mount them as ext3 file system currently ?

Thanks, 
Vijay Kumar.