DETERMINING ADJUSTMENTS OF STORAGE DEVICE TIMEOUT VALUES BASED ON SYNCHRONOUS OR ASYNCHRONOUS REMOTE COPY STATE

A determination is made as to whether a plurality of storage volumes controlled by a processor complex are secondary storage volumes that are in an asynchronous copy relationship with a plurality of primary storage volumes. A storage device timeout value for a storage device that stores the plurality of storage volumes is changed from a predetermined low value to a predetermined high value, wherein the predetermined high value is indicative of a greater duration of time than the predetermined low value, in response to determining that each of the plurality of storage volumes controlled by the processor complex and stored in the storage device are secondary storage volumes that are in the asynchronous copy relationship with the plurality of primary storage volumes.