it's all about aligning the tape consumption with the size of the arrays/tape storage so groups of tapes need to be rotated at the same time. if done properly,

it's all about aligning the tape consumption with the size of the arrays/tape storage so groups of tapes need to be rotated at the same time. if done properly, it's as simple as grab this 'row' in the robot and replace it with this 'row' from the storage area - when not, it becomes a confusing hodgepodge of shelves and containers and which-tape-is-where.