Patent ID: 8484415

Claim:
A hybrid storage system for a multi-level RAID architecture, comprising: a system control board; a first set of double data rate semiconductor storage device (DDR SSD) RAID controllers of a first level of the multi-level RAID architecture coupled to the system control board; a set of DDR SSD modules coupled to the first set of DDR SSD RAID controllers, the set of DDR SSD modules comprising a set of DDR SSD units; a first set of HDD/Flash SSD RAID controllers of the first level of the multi RAID architecture coupled to the system control board; and a set of hard disk drive (HDD) modules coupled to the first set of HDD/Flash SSD RAID controllers, the set of HDD modules comprising a set of HDD/Flash SDD units; wherein the system control board comprises: a first chip coupled to a first processor, a second chip coupled to a second processor, a second set of DDR SSD RAID controllers of a second level of the multi-level RAID architecture coupled to the first chip, a second set of HDD/Flash SSD RAID controllers of the second level of the multi-level RAID architecture coupled to the second chip, a first PCI-E switch coupled to the second set of DDR SSD RAID controllers, and a second PCI-E switch coupled to the second set of HDD/Flash SSD RAID controllers.