The present disclosure relates to a method, device and computer program product for managing a storage system. The storage system comprises a first storage device and a second storage device. In the method, a data object specified by a write request is searched for in the first storage device, the write request specifying the data object that is to be written to the storage system. According to determining that the data object is not present in the first storage device, the second storage device is notified to search for the data object in the second storage device. The data object is written to the storage system according to a search result of searching for the data object in the second storage device. An address mapping of the data object is determined based on an address to which the data object is written in the storage system, where the address mapping indicates an address of the data object in the storage system, and the method is implemented at the first storage device. The storage system may be managed in a more effective way, and the number of storage devices in the storage system may be extended easily. Further, provided are a corresponding device and computer program product.