Dell SDLT1 160/320GB The Dell SDLT 160/320 GB tape cartridge offers the perfect blend of reliability, efficiency, and durability for organizations seeking to store large amounts of data for years to come. Rated at 1,000,000 tape passes, the Dell SDLT 1 can last for 30 years and more. The SDLT 1 Dell provides 16 MB/s native and 32 MB/s compressed transfer speeds, which assures easy data backups and data recall at any time of the day or night.