Storage network for rebuilding encoded data slices and processing system for use therewith

A processing system of a storage network comprises:

• at least one processor;
• at least one memory that stores operational instructions, that when executed by the at least one processor cause the processing system to perform operations that include:
• encoding, via a dispersed error encoding, at least one data object as a write threshold number of encoded data slices;
• storing the write threshold number of the encoded data slices in a set of storage units of the storage network;
• determining when, less than a pillar width number of the encoded data slices of a common revision are retrievable from the set of storage units:
• retrieving a decode threshold number of the encoded data slices from others of the set of storage units;
• decoding the decode threshold number of the encoded data slices to reproduce the at least one data object;
• restoring availability of the pillar width number of the encoded data slices by:
• rebuilding at least a subset of encoded data slices of the set of encoded data slices, based on an encoding of the at least one data object;
• and
• storing the at least a subset of encoded data slices in the storage network.