> A dual gripper shaves some seconds off the overall time.

It may be worth pointing out that a dual gripper loses you some library
tape slots - 10% of them, in fact. The upper gripper cannot reach the
lowest 2 slot levels, nor can the lower gripper reach the highest 2 levels.
Therefore these 4 levels are lost (and are physically blanked off in our
library).

It's an open question why IBM chose to do it that way, because it was
surely possible to program the control PC to use the appropriate gripper
for these levels. Probably that nice warm feeling of redundancy.

Richard Foster

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