IBM 4mm DDS-3, 12/24GB With 12 GB of native storage and 24 GB of compressed capacity, it is possible to store large data sets in a short amount of time. Also, data recall when utilizing the IBM DDS3 is quite fast. Rigorous testing has revealed that the IBM DDS-3 tape cartridge can accommodate about 100 backups or 2,000 head passes. Also, IBM?s proprietary hub lock works to limit tape positioning errors and improves performance.