RAID10

添加凉快20G的硬盘然后分区：

/dev/sdb：

Disk /dev/sdb: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

 

   Device Boot      Start         End      Blocks   Id  System

/dev/sdb1               1        2610    20964793+   5  Extended

/dev/sdb5               1        1217     9775489+  83  Linux

/dev/sdb6            1218        2434     9775521   83  Linux

 

/dev/sdc:

Disk /dev/sdc: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

 

   Device Boot      Start         End      Blocks   Id  System

/dev/sdc1               1        2610    20964793+   5  Extended

/dev/sdc5               1        1217     9775489+  83  Linux

/dev/sdc6            1218        2434     9775521   83  Linux

 

创建RAID1

mdadm --create --auto=yes /dev/md2 --level=1 --raid-devices=2 /dev/sdc5 /dev/sdc6

把两组RAID1组成RAID0：

mdadm --create --auto=yes /dev/md0 --level=0 --raid-devices=2 /dev/md1 /dev/md2

查看RAID10：

mdadm --detail /dev/md0

/dev/md0:

        Version : 0.90

  Creation Time : Sun May 19 16:17:33 2013

     Raid Level : raid0

     Array Size : 19550720 (18.65 GiB 20.02 GB)

   Raid Devices : 2

  Total Devices : 2

Preferred Minor : 0

    Persistence : Superblock is persistent

 

    Update Time : Sun May 19 16:17:33 2013

          State : clean

Active Devices : 2

Working Devices : 2

Failed Devices : 0

  Spare Devices : 0

 

     Chunk Size : 64K

 

           UUID : 59bcfc86:e42a1226:185e0395:04c37a09

         Events : 0.1

 

    Number   Major   Minor   RaidDevice State

       0       9        1        0      active sync   /dev/md1

       1       9        2        1      active sync   /dev/md2

 

cat /proc/mdstat

Personalities : [raid1] [raid0]

md2 : active raid1 sdc6[1] sdc5[0]

      9775424 blocks [2/2] [UU]

 

md1 : active raid1 sdb6[1] sdb5[0]

      9775424 blocks [2/2] [UU]

 

md0 : active raid0 md2[1] md1[0]

      19550720 blocks 64k chunks

 

unused devices: <none>

 

格式化挂载：

mkfs -t ext3 /dev/md0
partprobe
mkdir /dd
mount /dev/md0 /dd

这样磁盘既有了RAID0的性能，又有了RAID1的容错了！