Losing important information can be disastrous to any organization so it is imperative that you back up your data.IBM realizes this and offers a reliable tape back up solution - the DLT 20/40GB internal tape drive. This drive is compatible with DLT type IV tape cartridges. It has a backup rate of 90MB per minute or 180MB per minute with hardware data compression and a capacity of 3 or 40GB with compression.