In any conversion scenario, you'll need to make a backup
copy of your data. So, even tho it is a more expensive
solution, go with RAID-10 (1+0) as mentioned earlier by
TidalWave. When data and peformance ar both critical
it is the only way to go.
RAID-10 provides better fault tolerance and rebuild performance
than RAID-01. Both RAIDs provide very good to excellent overall
performance by combining the speed of RAID 0 with the redundancy
of RAID 1 without requiring parity calculations.
Again in ANY scenario, it is a destroy and recreate AFTER
backing up your data.
