建立raid1+0双层架构的方法先创建raid1再使用创建的raid1创建raid0[root@ZQ ~]# ll /dev/sd*brw-rw----. 1 root disk 8,  0 Jun  4 05:35 /dev/sdabrw-rw----. 1 root disk 8,  1 Jun  4 05:35 /dev/sda1brw-rw----. 1 root disk 8,  2 Jun  4 05:35 /dev/sda2brw-rw----. 1 root disk 8,  3 Jun  4 05:35 /dev/sda3brw-rw----. 1 root disk 8, 16 Jun  4 05:47 /dev/sdbbrw-rw----. 1 root disk 8, 17 Jun  4 05:51 /dev/sdb1brw-rw----. 1 root disk 8, 18 Jun  4 05:51 /dev/sdb2brw-rw----. 1 root disk 8, 32 Jun  4 06:18 /dev/sdcbrw-rw----. 1 root disk 8, 33 Jun  4 06:24 /dev/sdc1brw-rw----. 1 root disk 8, 34 Jun  4 06:24 /dev/sdc2brw-rw----. 1 root disk 8, 35 Jun  4 06:24 /dev/sdc3brw-rw----. 1 root disk 8, 48 Jun  4 05:35 /dev/sddbrw-rw----. 1 root disk 8, 64 Jun  4 21:45 /dev/sdebrw-rw----. 1 root disk 8, 65 Jun  4 22:00 /dev/sde1brw-rw----. 1 root disk 8, 66 Jun  4 22:00 /dev/sde2brw-rw----. 1 root disk 8, 67 Jun  4 22:00 /dev/sde3brw-rw----. 1 root disk 8, 68 Jun  4 21:45 /dev/sde4brw-rw----. 1 root disk 8, 69 Jun  4 22:00 /dev/sde5brw-rw----. 1 root disk 8, 70 Jun  4 22:06 /dev/sde6brw-rw----. 1 root disk 8, 80 Jun  4 05:35 /dev/sdf[root@ZQ ~]# fdisk /dev/sdfWelcome to fdisk (util-linux 2.23.2).Changes will remain in memory only, until you decide to write them.Be careful before using the write command.Device does not contain a recognized partition tableBuilding a new DOS disklabel with disk identifier 0x951e738e.Command (m for help): nPartition type:   p   primary (0 primary, 0 extended, 4 free)   e   extendedSelect (default p): pPartition number (1-4, default 1): 1First sector (2048-20971519, default 2048): Using default value 2048Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519): +1GPartition 1 of type Linux and of size 1 GiB is setCommand (m for help): nPartition type:   p   primary (1 primary, 0 extended, 3 free)   e   extendedSelect (default p): pPartition number (2-4, default 2): 2First sector (2099200-20971519, default 2099200): Using default value 2099200Last sector, +sectors or +size{K,M,G} (2099200-20971519, default 20971519): +1GPartition 2 of type Linux and of size 1 GiB is setCommand (m for help): nPartition type:   p   primary (2 primary, 0 extended, 2 free)   e   extendedSelect (default p): pPartition number (3,4, default 3): 3First sector (4196352-20971519, default 4196352): Using default value 4196352Last sector, +sectors or +size{K,M,G} (4196352-20971519, default 20971519): +1GPartition 3 of type Linux and of size 1 GiB is setCommand (m for help): nPartition type:   p   primary (3 primary, 0 extended, 1 free)   e   extendedSelect (default e): pSelected partition 4First sector (6293504-20971519, default 6293504): Using default value 6293504Last sector, +sectors or +size{K,M,G} (6293504-20971519, default 20971519): +1GPartition 4 of type Linux and of size 1 GiB is setCommand (m for help): pDisk /dev/sdf: 10.7 GB, 10737418240 bytes, 20971520 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk identifier: 0x951e738e   Device Boot      Start         End      Blocks   Id  System/dev/sdf1            2048     2099199     1048576   83  Linux/dev/sdf2         2099200     4196351     1048576   83  Linux/dev/sdf3         4196352     6293503     1048576   83  Linux/dev/sdf4         6293504     8390655     1048576   83  LinuxCommand (m for help): wThe partition table has been altered!Calling ioctl() to re-read partition table.Syncing disks.[root@ZQ ~]# ll /dev/sdf*brw-rw----. 1 root disk 8, 80 Jun  4 22:26 /dev/sdfbrw-rw----. 1 root disk 8, 81 Jun  4 22:26 /dev/sdf1brw-rw----. 1 root disk 8, 82 Jun  4 22:26 /dev/sdf2brw-rw----. 1 root disk 8, 83 Jun  4 22:26 /dev/sdf3brw-rw----. 1 root disk 8, 84 Jun  4 22:26 /dev/sdf4先创建两个底层的 raid1[root@ZQ ~]# mdadm -C -v /dev/md11 -l 1 -n 2 /dev/sdf{
   1,2}mdadm: Note: this array has metadata at the start and    may not be suitable as a boot device.  If you plan to    store '/boot' on this device please ensure that    your boot-loader understands md/v1.x metadata, or use    --metadata=0.90mdadm: size set to 1047552KContinue creating array? ymdadm: Defaulting to version 1.2 metadatamdadm: array /dev/md11 started.[root@ZQ ~]# mdadm -C -v /dev/md12 -l 1 -n 2 /dev/sdf{
   3,4}mdadm: Note: this array has metadata at the start and    may not be suitable as a boot device.  If you plan to    store '/boot' on this device please ensure that    your boot-loader understands md/v1.x metadata, or use    --metadata=0.90mdadm: size set to 1047552KContinue creating array? ymdadm: Defaulting to version 1.2 metadatamdadm: array /dev/md12 started.再创建上层的raid0[root@ZQ ~]# mdadm -C -v /dev/md10 -l 0 -n 2 /dev/md11 /dev/md12mdadm: chunk size defaults to 512Kmdadm: Defaulting to version 1.2 metadatamdadm: array /dev/md10 started.下面就是格式化挂载，生成配置文件..............[root@ZQ ~]# cat /proc/mdstat Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] md10 : active raid0 md12[1] md11[0]      2093056 blocks super 1.2 512k chunks      md12 : active raid1 sdf4[1] sdf3[0]      1047552 blocks super 1.2 [2/2] [UU]      md11 : active raid1 sdf2[1] sdf1[0]      1047552 blocks super 1.2 [2/2] [UU]      md5 : active raid5 sde6[5] sde1[0] sde5[3](S) sde3[4] sde2[1]      3142656 blocks super 1.2 level 5, 32k chunk, algorithm 2 [4/4] [UUUU]      md1 : active raid1 sdc3[2] sdc2[1]      1047552 blocks super 1.2 [2/2] [UU]      md0 : active raid0 sdb2[1] sdb1[0]      2095104 blocks super 1.2 512k chunks [root@ZQ ~]# mdadm -Ds > /etc/mdadm.conf [root@ZQ ~]# cat !$cat /etc/mdadm.confARRAY /dev/md0 metadata=1.2 name=ZQ:0 UUID=00d9284f:6fd6b3b0:afc571c6:c5441608ARRAY /dev/md1 metadata=1.2 name=ZQ:1 UUID=137b8247:e0ced5a2:625805ac:e9b31692ARRAY /dev/md5 metadata=1.2 spares=1 name=ZQ:5 UUID=32056d5a:35cf0716:fd761180:cc7b848bARRAY /dev/md11 metadata=1.2 name=ZQ:11 UUID=cdc07c3a:a6b04c76:b343e0bf:14988216ARRAY /dev/md12 metadata=1.2 name=ZQ:12 UUID=54b9071a:bb899ed0:d4ffb87b:226794e1ARRAY /dev/md10 metadata=1.2 name=ZQ:10 UUID=f24de916:0a641485:5c0d2097:fbe976a3批量停止 必须卸载下来[root@ZQ ~]# mdadm -Ssmdadm: Cannot get exclusive access to /dev/md5:Perhaps a running process, mounted filesystem or active volume group?mdadm: Cannot get exclusive access to /dev/md1:Perhaps a running process, mounted filesystem or active volume group?mdadm: Cannot get exclusive access to /dev/md0:Perhaps a running process, mounted filesystem or active volume group?    unused devices: 
     
      raid删除[root@ZQ ~]# fdisk /dev/sda ^C    #创建两个分区sda5和sda6[root@ZQ ~]# mdadm  -C -v /dev/md1 -l 1 -n 2 /dev/sd5 /dev/sd6 ^C   #创建raid1[root@ZQ ~]# mdadm -Ds > /etc/mdadm.conf ^C    #生成配置文件开始删除[root@ZQ ~]# umount /dev/md1 /raid1 ^C  #已挂载的就先卸载[root@ZQ ~]# mdadm -Ss ^C # 停止raid设备[root@ZQ ~]# rm -rf /etc/mdadm.conf ^C   #删除raid 配置文件[root@ZQ ~]# mdadm --misc --zero -superblock /dev/sda5^C  #清除物理磁盘中的raid标识[root@ZQ ~]# mdadm --misc --zero -superblock /dev/sda6^C  #清除物理磁盘中的raid标识参数说明：mdadm --misc options... devices            report on or modify various md related devices   #报告或修改各种md相关设备--zero -superblock： erase the MD superblock from a device       #擦除设备中的md超级块