Patent ID: 9323658
Filing Date: 2016-04-26
CPC Classification: G06F

Claim Text:
1. A Redundant Array of Independent Disks (RAID) storage system communicatively coupled to a host processor, the storage system comprising: a flash memory device comprising first and second partitions; a plurality of disk drives configured as a plurality of logical units (LUNs); and a storage controller, coupled to the flash memory device and to the disk drives, operable to map the first partition into one or more RAID logical units for handling RAID Input/Output (I/O) requests by the host processor, the storage controller is further operable to map the second partition to the host processor as an extension of an Operating System (OS) cache, independent of RAID I/O processing, and wherein the storage controller represents the first partition as a Serial Attached Small Computer System Interface (SAS) storage device accessible to the host processor via the storage controller, and the storage controller represents the second partition as a separate memory device having a Peripheral Component Interconnect Express (PCIe) address that is directly accessible by the host processor.