The present disclosure relates to a method, device and program product for managing an access request in a storage system. In the method, based on an access request to the storage system, an address range of a data object involved in the access request is obtained. An access type of the access request is identified in accordance with determining that a garbage collection operation is performed on a data extent within the address range. The access request is responded to based on the access type by using a data extent within an address range in the storage system on which no garbage collection operation is performed.