Techniques for storage management involve: detecting a trigger for an adjustment of a redundant level for a set of RAIDs. Each of the set of RAIDs includes one or more RAID extents. Each RAID extent is formed by a plurality of storage extents from a set of storage extents. The set of storage extents is obtained by dividing a plurality of storage disks into storage extents. The plurality of storage extents are located in different storage disks of the plurality of storage disks. The techniques further involve: in response to detecting the trigger, selecting, from the set of RAIDs, a target RAID for which the redundant level is to be adjusted. The techniques further involve: adjusting the redundant level of the target RAID from a first redundant level to a second redundant level. Such techniques can improve the performance of a RAID storage system.