根据raid0属性，构建时至少需要两块硬盘，，硬盘类型不限假设系统后加入3块scsi硬盘，系统识别后分别是sdb、sdc、sdd各分成一个区，这里先设置sdb [root@myserver root]# fdisk /dev/sdbThe number of cylinders for this disk is set to 1044.There is nothing wrong with that, but this is larger than 1024,and could in certain setups cause problems with:1) software that runs at boot time (e.g., old versions of LILO)2) booting and partitioning software from other OSs(e.g., DOS FDISK, OS/2 FDISK)Command (m for help):n –新建分区First cylinder (1-1044, default 1):1 –直接回车就是默认Using default value 1Last cylinder or +size or +sizeM or +sizeK (1-1044, default 1044):1044 –直接回车就是默认Using default value 1044
Command (m for help): w –保存退出The partition table has been altered!Calling ioctl() to re-read partition table.The new table will be used at the next reboot.Syncing disks.
[root@myserver root]# fdisk -l /dev/sdb –查看分区结果，这块硬盘只分一个区，所以只有一个”sdb1″Disk /dev/sda: 8589 MB, 8589934592 bytes255 heads, 63 sectors/track, 1044 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesDevice Boot Start End Blocks Id System/dev/sdb1 1 1044 3068383+ 83 Linux同样方法对另外两个新加硬盘进行分区，得到 /dev/sdc1 和 /dev/sdd1
下面看系统中是否已经安装了raid软件包[root@myserver root]# rpm -q raidtoolsraidtools-1.00.3-2 –已经安装[root@myserver root]# rpm -ql raidtools-1.00.3-2 –查看示范配置文件路径/usr/share/doc/raidtools-1.00.3/raid0.conf.sample/usr/share/doc/raidtools-1.00.3/raid1.conf.sample/usr/share/doc/raidtools-1.00.3/raid4.conf.sample/usr/share/doc/raidtools-1.00.3/raid5.conf.sample/usr/share/doc/raidtools-1.00.3/raidtab.sample—[root@myserver root]# cp /usr/share/doc/raidtools-1.00.3/raid0.conf.sample /etc/raidtab–把raid0的示范配置文件拷到/etc下，并命名为raidtab
修改raidtab文件内容以符合当前情况# Sample raid-0 configurationraiddev /dev/md0 –raid设备raid-level 0 # it’s not obvious but this *must* be –raid级别# right after raiddevpersistent-superblock 0 # set this to 1 if you want autostart,# BUT SETTING TO 1 WILL DESTROY PREVIOUS# CONTENTS if this is a RAID0 array created# by older raidtools (0.40-0.51) or mdtools!chunk-size 16nr-raid-disks 3 –由几块硬盘组成nr-spare-disks 0device /dev/sdb1 –第一块raid-disk 0 –硬盘序号0，代表第一块device /dev/sdc1 –第二块raid-disk 1 –硬盘序号1，代表第二块device /dev/sdd1 –第三块raid-disk 2 –硬盘序号2，代表第三块
[root@myserver root]# mkraid /dev/md0 –创建raid设备handling MD device /dev/md0analyzing super-block
[root@myserver root]# mkfs.ext3 /dev/md0 –格式化已创建的raid设备
[root@myserver root]# mount /dev/md0 /mnt/md0 –挂载到/mnt/md0
然后df查看一下是否挂载成功并测试是否可写进文件目前为止raid0就算构建完了，现在他的存储速度就要快了很多为了长久使用这个raid设备，可将它写进fstab[root@myserver root]# cat /etc/fstabLABEL=/ / ext3 defaults 1 1/dev/md0 /mnt/md0 ext3 defaults 0 0
[root@myserver root]# raidstop /dev/md0 –停止raid0设备工作，停止前要先卸载/dev/md0
[root@myserver root]# lsraid -A -a /dev/md0 –查看raid设备中硬盘工作状态，是否有坏盘
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raid1、raid5和raid0构建类似，不过需要注意：
1，因为raid1是做数据镜像，所以构建raid1需要的硬盘数为偶数2，因为raid5是做数据校验，所以构建raid5需要的硬盘数为至少三块3，采用对应的示范配置文件，raid1就取raid1.conf.sample，raid5就取raid5.conf.sample，按实际情况修改它
从起点，到尽头，也许快乐，或有时孤独，
