upgrade mdtools0.42 -> raidtools0.90

[Schackel, Fa. Integrata, ZRZ DA]

Hi,

I've heared/read of so many new features of 
RaidTools 0.90, so I was wondering if I can
use my mdtools 0.42 created md-devices with 
the new raidtools 0.90  without any loss of 
data ?
Are there any changes I have to apply to the
md-devices to get benefit of the new features?

Thx,
Bernhard