cal page 0 within the same physical block (PBN0) where the physical location of the two pages within the block identifies the most recently updated page:  0                           SANDISK CORP   v. KINGSTON TECH          Specifically, in Figure 00, the new physical block (PBN0) contains two versions of original page 0 located at PBN0 physical page 0 and PBN0 physical page 0. 