US Patent 11573708 Fail-safe redundancy in aggregated and virtualized solid state drives

A solid state drive having at least one component solid state drive, a spare solid state drive, and a drive aggregator. The drive aggregator has at least one host interface, at least one drive interface connected to the at least one component solid state drive, and an interface connected to the spare solid state drive. The drive aggregator is configured to maintain, in the spare solid state drive, a copy of a dataset that is stored in the component solid state drive. In response to a failure of the component solid state drive, the drive aggregator is configured to substitute a function of the component solid state drive with respect to the dataset with a corresponding function of the spare solid state drive, based on the copy of the dataset maintained in the spare solid state drive.