use newer MD RAID 1.0 specification (thanks to Robert de Bath)

Turn off the error "Inconsistent Raid version information" for Version 
1.0 MD RAID mirror pairs. It also corrects the error message, as the 
version information is just incompatible not inconsistent. No other 
charges are required as 1.0 devices have the same layout as v0.90 
devices except that they work with drives in excess of 2TB.
