Certance Certified - Only Certance supplies are certified to meet the strict performance and quality specifications defined by Certance engineers. Certance data cartridges are engineered and specified to perform optimally with Certance tape drivesCertance System Tested - Tape drives and data cartridges must work together. Certance Quality Assurance conducts system tests to ensure that Certance tape drives and data cartridges achieve optimal performance, together