基于ECC校验算法的记录器设计

Design of Storage Device with Error Checking and Correction

摘要:

鉴于K9MDG08U5M在存储过程中出现的错“位”现象,提出利用ECC算法对数据进行校验和纠错。由于该款NAND FLASH一页数据出现的错“位”现象有时不止一位,而一般的ECC算法其纠错能力只有1 bit/4 kB,故一种纠错能力更强的新型算法将被设计和实现；该新型算法具有8 bit/4 kB的纠错能力和16 bit/4 kB的检错能力,且已成功应用于某数据采集存储系统中。

Abstract:

In despite of the NAND FLASH such as K9MDG08U5M is taken as the most reliable storage medium, there is still little probability of single bit error. To detect and correct the error, an Error Checking and Correction(ECC) algorithm is designed and implemented. According to our experiment, the greater probability of bit error is occurred by this FLASH. So the traditional ECC algorithm whose correcting ability is 1bit/4kB cannot achieve the task. In the paper, an algorithm with greater correcting ability is discussed. This algorithm is applied successfully to the storage device, whose correcting ability is 8bit/4kB and justifying error ability is 16bit/4kB.