RAID2工作原理图解及特点分析

RAID2工作原理图解及特点分析
RAID 2: Hamming Code ECC Characteristics/Advantages 1. "On the fly" data error correction 2. Extremely high data transfer rates possible 3. The higher the data transfer rate required, the better the ratio of data disks to ECC disks 4. Relatively simple controller design compared to RAID levels 3,4 & 5 Disadvantages 1. Very high ratio of ECC disks to data disks with small...

RAID1工作原理图解及特点分析

RAID1工作原理图解及特点分析
RAID1: Mirroring and Duplexing Characteristics/Advantages 1. One Write or two Reads possible per mirrored pair 2. Twice the Read transaction rate of single disks, same Write transaction rate as single disks 3. 100% redundancy of data means no rebuild is necessary in case of a disk failure, just a copy to the replacement disk 4. Transfer rate per block is equal to that of a s...

RAID0工作原理图解及特点分析

RAID0工作原理图解及特点分析
RAID 0: Striped Disk Array without Fault Tolerance Characteristics/Advantages 1. RAID 0 implements a striped disk array, the data is broken down into blocks and each block is written to a separate disk drive 2. I/O performance is greatly improved by spreading the I/O load across many channels and drives 3. Best performance is achieved when data is striped across multiple con...

STORNEXT参数设置说明

STORNEXT参数设置说明
一、 做文件系统 1、 block size 文件系统的block的大小,一个block是文件在物理硬盘/RAID上的最小单位。SNFS默认是4096 Byte,也就是4K。可选范围是4K-512K。 硬盘的最小单位是sector(扇区),一个Sector的大小是512 Byte。 文件系统的最小单位是block(块),SNFS默认一个block是4096 Byte。 2、 stripe breadth 一个条带的宽度。单位是KB或Block。一个读/写操作是在各个磁盘上的平均大小。SNFS推荐256K...
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