A mechanism is provided for increasing the efficiency of block-level processes. Responsive to detecting an I/O write to a storage volume, a determination is made as to whether the I/O write matches one or more suspicious I/O reads in a plurality of suspicious I/O reads previously recorded in a memory. Responsive to the I/O write matching one or more suspicious I/O reads in the plurality of suspicious I/O reads, an identification is made that there is a data relocation associated with the sector associated with the I/O write. A data relocation application is informed of the data relocation of the sector associated with the one or more suspicious I/O reads associated with the sector indicated by the I/O write. Each sector associated with the one or more suspicious I/O reads is then released in a file system for reuse.