Abstract: There has been disclosed a storage apparatus comprising a plurality of drive units each for writing and reading out data into and from a removable storage medium a transport unit for transporting a storage medium between a plurality of slots for accommodating storage mediums and the driving units and a control unit for controlling transportation of a storage medium by the transport unit. The control unit controls the transport unit in accordance with a command issued by a computer connected to the storage apparatus, setting a storage medium in a drive unit. The drive unit writes and reads out data into and from the storage medium in accordance with a parameter determined for a combination of the drive unit and the storage medium.

Abstract: In an information processing apparatus, when error of an instruction read out from an instruction storage area is detected, a correct instruction is created and rewritten in the instruction storage area. The rewritten instruction is read out for undergoing again error detection. When error is again detected, decision is made as to whether the error is a fixed one. In the case of the fixed error, a correct instruction is stored in an alternative storage area, while a remedy pattern capable of evading that fixed error is written in the instruction storage area at an address location where the fixed error is detected. The correct instruction corresponding to the remedy pattern is read out from the alternative storage area.