Data replication control for high available system

Abstract

A method for redundancy loss recovery. The method may include creating pairs of quorum sets, wherein each pair of the pairs of quorum sets comprises at least two volumes and a quorum, and each of at least two volumes and quorum are located at different storage devices; for a failure occurring in a storage device associated with the pairs of quorum sets or in a network communication between storage devices of the pairs of quorum sets, modifying volume attributes associated with volumes of the pairs of quorum sets; and for the failure occurring in a storage device associated with the pairs of quorum sets, relocating quorum associated with the failed storage device to another storage device that is different from storage devices associated with the pairs of quorum sets.

Dependencies are inferred from the claim text.