最低硬盘数量 2 优点/特点 缺点 极高的磁盘读写效率 缺乏校验恢复机制而不是真正 的RAID 没有校验所占用的CP资源 没有数据容错能力,一(硬 盘)毁俱(整个阵列〉毁 人计、使用与配置简单 不可能用于任务苛求的环境 运用领域 视频生成与编辑 图像编辑 较为“拥挤”的操作 其他需要大的传输带宽的操作
RAID 1- Mirroring ◆ Mirroring and Duplexing(相互镜像) 镜像——两个硬盘的内容完全一样,内容彼此 备份。写入时,RAD控制器将数据同时写入两 个硬盘。其中任何一个硬盘的数据出现问题, 可以马上从另一个硬盘中进行恢复。 RAID Level 1 requires a minimum of 2 drives to implement flash demo with raid1 RAID 1 BcD ABCD EFGH MN0 GH 0 COPYRIGHT 1996, 1997, 1996, 1999 ADVANCED COMPUTER NETWORK CORPORATION
RAID 1 = Mirroring Mirroring and Duplexing（相互镜像） 镜像——两个硬盘的内容完全一样，内容彼此 备份。写入时，RAID控制器将数据同时写入两 个硬盘。其中任何一个硬盘的数据出现问题， 可以马上从另一个硬盘中进行恢复。 RAID Level 1 requires a minimum of 2 drives to implement flash demo with RAID1
最低硬盘数量 2 优点/特点 缺点 理论上两倍的读取效率 EC效率低下,磁盘ECC的CPU占 用率是所有RAID等级中最高的 100%的数据冗余功能 在软RAID1中效能下降严重,强 烈硬RAID1方式 设计、使用与配置较为简单 在软RAID方式很少能支持硬盘 的热插拔 运用领域 财务统计与数据库 金融系統 其他需要高度数据可维护性的操作
RAIDO+I- Stripping Mirror RAID Level 0+1 requires a minimum of 4 drives to implement Very expensive /High overhead flash demo with RAiD 0+1 Mo RAID 0+1 striping B EFGH ABCD F striping G mirroring COPYRIGHT O 1996, 1997, 1998, 1999 ADVANCED COMPUTER&NETWORK CORPORATION
RAID0+1 = Stripping + Mirror RAID Level 0+1 requires a minimum of 4 drives to implement Very expensive / High overhead flash demo with RAID 0+1
RAIDIO- Mirroring stripping This can be found only in hardware RAID RAID-10 combines RAID O and RAID 1 by striping data across multiple drives without parity and it mirrors the entire array to a second set of drives. This process delivers good performance and excellent data protection, but cuts the usable disk space in half RAid-10 requires a minimum of four same-size drives, and is also the most expensive RAID solution and offers limited 25 scalability flash demo with RAID 10(1+0 RAID 10 B B B mirroring striping COPYRIGHT 1996, 1997, 1998, 1999 ADVANCED COMPUTER NETWORK CORPORATION
RAID10 = Mirroring + stripping This can be found only in hardware RAID RAID-10 combines RAID 0 and RAID 1 by striping data across multiple drives without parity and it mirrors the entire array to a second set of drives. This process delivers good performance and excellent data protection, but cuts the usable disk space in half. RAID-10 requires a minimum of four same-size drives, and is also the most expensive RAID solution and offers limited scalability. flash demo with RAID 10 ( 1+0)