Chapter 240

Supercapacitor-based power backup prevents data loss in RAID systems

Jim Drew


A supercapacitor-based power backup system that prevents data loss in RAID systems is described.


RAID system

backup power

supercapacitor charger



Redundant arrays of independent disks, or RAID, systems by nature are designed to preserve data in the face of adverse circumstances. One example is power failure, thereby threatening data that is temporarily stored in volatile memory. To protect this data, many systems incorporate a battery-based power backup that supplies short-term power—enough watt-seconds for the RAID controller to write volatile data to nonvolatile memory. However, advances in flash memory ...

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