According to implementations of the present disclosure, there is provided a method for managing a storage system, extents in the storage system being from multiple storage devices in a resource pool associated with the storage system. In the method, regarding multiple extents comprised in a storage device among the multiple storage devices, respective service states of the multiple extents are obtained. Respective features of respective extents among the multiple extents are determined on the basis of respective service states of the multiple extents. An association relation between a failure in an extent in a storage device in the resource pool and a feature of the extent is obtained. A failure extent in which a failure is to be occurred is identified from the multiple extents on the basis of respective features of the multiple extents and the association relation.