Under normal conditions, if you select Offline on the Core for a particular LUN, the contents of the blockstore on the corresponding Edge is synchronized and then cleared.

However, there can be a situation in which it is necessary to make sure the entire contents of the blockstore on an Edge is erased to a military grade level. While you can achieve this level of deletion, it involves the use of commands not normally available for general use. To ensure the correct procedures are followed, open a support case with Riverbed Support.