Method for accessing data in a storage system architecture, the architecture comprises at least one disk array subsystem, comprising the following steps. Provide a SAS for managing a first and a second media extent (ME) the at least one subsystem. Obtain a location index corresponding to a host LBA via a BAT. Obtain a location information of a physical section located in the first ME corresponding to the location index via a physical section to virtual section cross-referencing functionality. Update the cross-reference in the cross-referencing functionality so that the location information obtained from the cross-referencing functionality corresponding to the location index is the location information of the second physical section. A host IO request addressing the host LBA accesses data in the second physical section utilizing the location information of the second physical section.