A support for balls includes a receiving element provided with a plurality of gripping resilient and arched members adapted to define a gripping volume of a ball. The support member is placed on top of the mattress core before the mattress cover is attached. Data can be recovered or made available even in the case of loss of N, N+1, or more devices or storage elements over which stripes of the data set have been distributed or partitioned. The pressurizing unit includes an energizing member, its support member, and a transfer member.