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Battery calibration mechanism in RAID system

IP.com Disclosure Number: IPCOM000013004D
Original Publication Date: 2000-Aug-01
Included in the Prior Art Database: 2003-Jun-12

Publishing Venue

IBM

Abstract

Disclosed is a system for the back-up battery in a RAID system to be discharged and charged for calibration of its capacity. Normally, a RAID(Redundant Arrays of Inexpensive Disks) system has a cache memory for better performance. And some RAID systems have back-up battery for the cache memory back-up during AC power outage. And some of the back-up batteries are NiMH type battery. In the course of time, NiMH battery degrades and the error accumulates in the fuel gauge of the back-up battery. So, generally, the NiMH type back-up battery is discharged and charged periodically to measure its real capacity and calibrate the fuel gauge. This function is called calibration function. This disclosure is related to the calibration function of the back-up battery used in a RAID system. With the proposed method, battery calibration function is performed automatically and users don't have to care about the calibration function.