Redundant Array of Independent Memory Devices

DRAM memory reliability is increasingly a concern as recent studies found. In this letter, we propose RAIMD (Redundant Array of Independent Memory Devices), an energy-efficient memory organization with RAID-like error protection. In this organization, each memory device works as an independent memory module to serve a whole memory request and to support error detection and error recovery. It relies on the high data rate of modern memory device to minimize the performance impact of increased data transfer time. RAIMD provides chip-level error protection similar to Chipkill but with significant energy savings. Our simulation results indicate that RAIMD can save memory energy by 26.3% on average with a small performance overhead of 5.3% on DDR5-4800 memory systems for SPEC2017 multi-core workloads.