Field - cn2 Device Flag Extension 2 Map: SMF74B Based on: SMF74CN2 Description Device Flag Extension 2 Flag fields This is a flag field with the following bit fields: Field Bit-Position Description hwr 0 =1 HyperWrite requested xpv 1 =1 Device in SuperPAV mode sir 2 =1 Device is capable of synch I/O read requests siw 3 =1 Device is capable of synch I/O write requests