Create an image mode volume.

1  mkvdisk  -mdiskgrp
2.1 
2.1   -vtype   -mdisk
2.1 
2.1 ?  -iogrp
2.1 
2.1 
1?  -accessiogrp
2.1 
2.1 ?  -size ?  -accessiogrp
2.1 
2.1 ?  -fmtdisk?  -nofmtdisk?  -rsize
2.1 
2.1 
2.1 auto
1? -warning
2.1 
2.1 ?  -rsize (continued)?  -autoexpand? -grainsize
2.1! 32
2.1 64
2.1 128
2.1 256?  -deduplicated?  -import?  -copies ?  -createsync ?   -syncrate  ?  -mirrorwritepriority
2.1 
2.1 ?  -udid  ?  -node
2.1 
2.1 ?  -unit
2.1 b
2.1 kb
2.1! mb
2.1 gb
2.1 tb
2.1 pb?  -name ?  -cache
2.1! readwrite
2.1 readonly
2.1 none?  -tier
2.1 
2.1 
2.1 
2.1 
2.1 ?  -easytier
2.1 
2.1