>  > with RAID1 surely will not be any problems. only RAID5 could introduce
>  > problems by rearranging write sequence some way, RAID1 just writes the
>  > same to 2 drives in paralell 
> 
> "Rearranging" the write sequence won't affect RAID5 at all.  It doesn't
> rearrange the underlying block writes at all.
so there should not be any problem at all