固态硬盘RAID阵列技术进展  

Progress of SSD-Based RAID Technology

作　　者：李振华[1] 楼向雄[2] 

机构地区：[1]浙江商业职业技术学院艺术设计学院,杭州310053 [2]杭州电子科技大学通信工程学院,杭州310018

出　　处：《世界科技研究与发展》2017年第1期33-38,共6页World Sci-Tech R&D

基　　金：2016年度浙江省教育技术研究规划(JB093);浙江省2015年度高等教育教学改革项目(jg2015307)资助

摘　　要：固态硬盘作为一种新型闪存设备,因高性能比、高可靠性、低功效等优点倍受关注。然而,固态硬盘的存储可靠性与访问高效性在大数据时代面临越来越大的挑战。通过RAID控制器联结多个硬盘存储设备,形成固态硬盘RAID阵列,能够为用户提供大容量存储空间,保证高效的并行访问性能,同时提供不同程度的可靠性保证。本文通过系统阐述固态硬盘RAID阵列技术的研究现状,对不同RAID机制进行分类总结。在多个固态硬盘构成的RAID阵列方面,根据磁盘之间损耗机制的不同,对两种代表性研究情况进行概括;在固态硬盘内部的芯片级RAID方面,主要对延迟校验数据更新的RAID技术、高性能高可靠性的RAID技术、增强可靠性的RAID技术及嵌入式RAID技术的特点与不足进行阐述。最后,对固态硬盘RAID阵列技术进行总结分析,并提出今后该领域的研究重点和方向,主要包括:嵌入式RAID技术、可靠性分析等。As a new flash memory device, SSD has attracted much attention for its high-performance, high reliability and low efficiency. However, the reliability of SSD storage and efficiency of access has been increasingly challenged in the era of big data. By coupling numbers of hard disk storage devices through RAID controller, a SSD-based RAID is formed. In this way, users are provided with high-capacity storage space, efficient parallel access performance and different degrees of reliability assurance. Through systematic analysis of previous research on SSD-based RAID technology, different mechanism of SSD- based RAID are summarized and classified. In the respect of RAID array composing of solid hard disks, two representative studies categorized by different loss mechanism between disks are mainly summarized. In the aspect of chip level in SSD RAID, the characteristics and weakness of the RAID technology of delay calibration data, high-performance as well as highreliability RAID technology,reliability-enhanced RAID technology and embedded RAID technology are discussed. Lastly, a generalization of SSD-based RAID technology is presented. In addition, research trends in this area are put forward, including embedded RAID technology,reliability analysis.

关 键 词：固态硬盘 RAID 存储系统 闪存 磁盘 

分 类 号：TP333.35[自动化与计算机技术—计算机系统结构]