Identifying and recovering unused storage resources on a storage system

A non-transitory tangible computer readable storage medium having stored thereon a computer program for identifying and recovering unused storage resources on a storage system, the computer program including a set of instructions which, when executed by a computer, cause the computer to perform a method comprising the steps of:

• obtaining storage group usage attributes for a storage group, the storage group usage attributes identifying whether the storage group is masked, input/output (IO) information on the storage group, local protection information associated with the storage group, and remote protection information associated with the storage group;
• using a first rule to assign a first recovery score to the storage group based on whether the storage group is masked;
• using a second rule to assign a second recovery score to the storage group based on the IO information on the storage group;
• using a third rule to assign a third recovery score to the storage group based on the local protection information associated with the storage group;
• using a fourth rule to assign a fourth recovery score to the storage group based on the remote protection information associated with the storage group;
• combining the first recovery score, second recovery score, third recovery score, and fourth recovery score, to assign a final recovery score to the storage group;
• comparing the final recovery score assigned to the storage group with a threshold;
• and based on the comparison between the final recovery score assigned to the storage group and the threshold, selectively identifying the storage group as a potential storage group for recovery of unused storage resources.