We describe a replacement for RAID 6, based on a new linear, systematic code, which detects and corrects any combination of E errors (unknown location) and Z erasures (known location) provided that Z+2E≤4. The code is at the core of a RAID technology called PentaRAID, for which the two co-inventors were awarded a US utility patent. The problem that we address is that of weak data protection of RAID 6 systems. The known vulnerability is that RAID 6 may recover from not more than 2 failed disks in a RAID, if we know which disks failed.