Embodiments of the present disclosure relate to a method, an electronic device, and a computer program product for managing a storage system. The method includes: determining multiple storage units provided by multiple storage devices, each storage unit in the multiple storage units having a storage space allocated from a first number of storage devices among the multiple storage devices; dividing the multiple storage units into at least one storage unit group based on a total number of the multiple storage devices and the first number, each storage unit group in the at least one storage unit group including a second number of storage units; and storing, based on a logical address of to-be-stored data, the to-be-stored data into the at least one storage unit group. Embodiments of the present disclosure can allocate storage resources more reasonably and thus improve the performance of a storage system for processing sequential data.