An octagonal bulk bin of corrugated paperboard has opposed parallel side walls spaced a predetermined distance apart and opposed parallel end walls spaced a predetermined distance apart. A second forecasting model is built based on a second data collection having intervals aggregated from intervals of the first data collection, wherein the second forecasting model is at a different aggregation level than the first forecasting model. The system further has a plurality of flip-flops, a multiplexor coupled to the plurality of flip-flops, a first control block for controlling to hold an input data within the plurality of flip-flops, and a second control block for controlling a timing of an output data from the plurality of flip-flops via the multiplexor with a programmable delay. If the delete notification does apply to the entire storage volume, a second set of actions can be taken with the storage stack filter in response to the delete notification. Each of the convex parts is formed with at least one a low-height portion and a high-height portion in an axial direction of a rotor, respectively.