Running retention operations for tape cartridges

Learn about the importance of retention operations for tape cartridges.

For older tape cartridge types, the quarter-inch tape units run a retention operation whenever a tape cartridge is loaded. Retention means that the tape unit moves the tape to the end-of-tape position and rewinds it to the beginning-of-tape position. The retention operation is part of the load sequence. The tape unit also runs a retention operation if a tape cartridge is in the tape unit when the door is closed.

When using MLR3-25GB, DC5010, MLR1-16GB, SLR100, and SLR60 tape cartridges, the tape units run the retention operation only when necessary (as determined by the tape unit) to maintain correct tape tension. The approximate retention times are as follows.