DEC StorageWorks TZ89N-VW SBB
This is a DLT7000 (TZ89) DLT drive in a 5.25" StorageWorks canister which takes up three slots in a StorageWorks shelf. The TZ89 stores 35GB on a CompacTape IV cartridge, or 70GB if you can achieve a 2:1 compression ratio for the data being stored. The drive itself is made by Quantum as DEC sold their tape and disk product lines in 1994.
