linux操作系统RAID创建

云计算及其应用*1云计算基础vSphere私有云搭建及应用openstack私有云搭建及应用23目录*认识虚拟化与云计算数据中心构建云计算基础linux操作系统RAID创建Linux下软RAID的创建过程创建RAID阵列#mdadm-Cv/dev/md0-l1-n2-x1/dev/sd{b,c,d}1

或者-C参数为创建阵列模式。/dev/md0为阵列的设备名称。-l1为阵列模式，可以选择0，1，4，5，分别对应RAID0，RAID1，RAID4，RAID5。-n2为阵列中活动磁盘的数目，该数目加上备用磁盘的数目等于阵列中总的磁盘数目。-x1为阵列中备用磁盘的数目，因为当前阵列模式是RAID1，所以设置当前阵列中含有一块备用磁盘。/dev/sd{b,c,d}1为参与创建阵列的磁盘名称，阵列由三块磁盘组成，其中两块为镜像的活动磁盘，一块备用磁盘提供故障后的替换。linux操作系统RAID创建Linux操作系统创建RAID卷[root@binzai桌面]#fdisk–l//查看当前磁盘分配情况Disk/dev/sda:64.4GB,64424509440bytes255heads,63sectors/track,7832cylindersUnits=cylindersof16065*512=8225280bytesSectorsize(logical/physical):512bytes/512bytesI/Osize(minimum/optimal):512bytes/512bytesDiskidentifier:0x000f2272DeviceBootStartEndBlocksIdSystem/dev/sda1*12620480083LinuxPartition1doesnotendoncylinderboundary./dev/sda22638513072000083Linux/dev/sda338514112209715282Linuxswap/Solarislinux操作系统RAID创建Linux操作系统创建RAID卷[root@binzai桌面]#fdisk/dev/sda//对设备sda进行分区管理WARNING:DOS-compatiblemodeisdeprecated.It'sstronglyrecommendedtoswitchoffthemode(command'c')andchangedisplayunitstosectors(command'u').Command(mforhelp):n//创建一个分区Commandactioneextendedpprimarypartition(1-4)e

//创建扩展分区Selectedpartition4Firstcylinder(4112-7832,default4112):

//直接回车不用输入即是从默认开始位置Usingdefaultvalue4112Lastcylinder,+cylindersor+size{K,M,G}(4112-7832,default7832):

//直接回车不用输入即是从默认结束位置Usingdefaultvalue7832Command(mforhelp):p//打印分区表信息linux操作系统RAID创建Linux操作系统创建RAID卷Disk/dev/sda:64.4GB,64424509440bytes255heads,63sectors/track,7832cylindersUnits=cylindersof16065*512=8225280bytesSectorsize(logical/physical):512bytes/512bytesI/Osize(minimum/optimal):512bytes/512bytesDiskidentifier:0x000f2272DeviceBootStartEndBlocksIdSystem/dev/sda1*12620480083LinuxPartition1doesnotendoncylinderboundary./dev/sda22638513072000083Linux/dev/sda338514112209715282Linuxswap/Solaris/dev/sda441127832298875645ExtendedCommand(mforhelp):n

//创建一个逻辑分区Firstcylinder(4112-7832,default4112)://直接回车默认起始位置Usingdefaultvalue4112Lastcylinder,+cylindersor+size{K,M,G}(4112-7832,default7832):+2000M//从起始位置加2000M的容量linux操作系统RAID创建Linux操作系统创建RAID卷Command(mforhelp):w//保存分区表Thepartitiontablehasbeenaltered!Callingioctl()tore-readpartitiontable.WARNING:Re-readingthepartitiontablefailedwitherror16:设备或资源忙.Thekernelstillusestheoldtable.Thenewtablewillbeusedatthenextrebootorafteryourunpartprobe(8)orkpartx(8)Syncingdisks.Youhavenewmailin/var/spool/mail/root[root@binzai桌面]#partx/dev/sda//使内核迅速识别到新建分区#1:2048-411647(409600sectors,209MB)。。。。#8:78381198-82493774(4112577sectors,2105MB)#9:82493838-86606414(4112577sectors,2105MB)[root@binzai桌面]#reboot//重启计算机linux操作系统RAID创建Linux操作系统创建RAID卷[root@binzai桌面]#mdadm-C/dev/md0-l5-n3-x1/dev/sda[6,7,8,9]//创建RAID5卷mdadm:Defaultingtoversion1.2metadatamdadm:array/dev/md0started.[root@binzai桌面]#mdadm-D/dev/md0//查看md0卷的信息/dev/md0:

。。。。。。RebuildStatus:11%completeName:binzai.localdomain:0(localtohostbinzai.localdomain)UUID:58500eba:24d37761:9b327235:3f508d54Events:2NumberMajorMinorRaidDeviceState0860activesync/dev/sda61871activesync/dev/sda74882sparerebuilding/dev/sda8//这里就说明未成功389-spare/dev/sda9linux操作系统RAID创建[root@binzai桌面]#mdadm-D/dev/md0/dev/md0:。。。。。NumberMajorMinorRaidDeviceState0860activesync/dev/sda61871activesync/dev/sda74882activesync/dev/sda8//说明已经成功389-spare/dev/sda9[root@binzai桌面]#mkfs-text4/dev/md0//格式化md0卷mke2fs1.41.12(17-May-2010)文件系统标签=操作系统:Linux块大小=4096(log=2)分块大小=4096(log=2)Stride=128blocks,Stripewidth=256blocks257024inodes,1027584blocks正在写入inode表:完成Creatingjournal(16384blocks):完成Writingsuperblocksandfilesystemaccountinginformation:完成Thisfilesystemwillbeautomaticallycheckedevery33mountsor180days,whichevercomesfirst.Usetune2fs-cor-itooverride.linux操作系统RAID创建挂载md0卷并测试[root@binzai桌面]#mkdir/mnt/md0