6.3.24 Verification and retrieval  In some commercial software, tape read/write error can be reported automatically during the data backup and verification process. This function is normally implemented with cyclic redundancy check, a technology using checksum against data to detect errors for transmission or storage. It is recommended that an error checking function should be implemented in any archival storage system. Error checking is difficult to implement in open source because that capability is linked to specific hardware. A commercially available stand-alone LTO Cartridge Memory Reader is the “Veritape” from MPTapes, Inc. and recently, Fuji Magnetics announced a Chip Reader Diagnostics System for LTO-Cassettes, bundled with software.