In an automated library, data cartridges, such as magnetic tape cartridges, are stored in multi-cartridge storage cells or shelves and accessed by data storage drives. An accessor with a deep-reach gripper transports cartridges between storage cells and storage drives. The gripper is capable of extending into the cell to grip and remove a cartridge stored in any position therein. The gripper may include a scissors mechanism, a set of units extendable with lead screws, or another extendable mechanism.