1. A method, comprising: receiving, by a processor, metadata describing a first cache configured as a master cache having non-destaged data; defining, using the received metadata, a second cache configured as a backup cache for the master cache; retrieving, subsequent to defining the second cache, the non-destaged data from the first cache; and storing the non-destaged data to the second cache; wherein the metadata is selected from a list comprising a set of regions, on a storage device, that are associated with the first cache, and a set of pointers referencing the non-destaged data.