An instruction to write data to a write logical address is received where the write logical address is a member of a group of one or more logical addresses. It is determined if data associated with any of the logical addresses in the group of logical addresses has been written to any of a plurality of open groups of locations. If so, the data is written to the open group of locations to which data from the group of logical addresses has already been written to. If not, an open group of locations to write to is selected from the plurality of open groups of locations.