1. An autonomous error recovery method for a cache of a computing system, said method comprising: testing addressed data and associated control information of a cache of a computing system for a permanent error within the cache, wherein the addressed data is to be provided responsive to a request therefor by a requester; and automatically retrieving contents of an addressed storage compartment of a main memory of the computing system if permanent error is detected in the cache by the testing, and providing the contents of the addressed storage compartment to the requester responsive to the request, thereby bypassing the cache, wherein the cache and the main memory comprise separate memory devices of the computing system.