A:

IBM prides itself in making all of its chassis backwards AND forward compatible with all of their blades. So all blades are compatible with all their blade Chassis. IBM has assured us that there is no change expected and that they will stick to their forward and backward compatibility standard. There is only one exception to that rule: If you plan on using the HX5 blade, the only item compatible with the H series of Blade Chassis is 9U.