Linux CentOS5.5 软RAID10 (二)配置成RAID10
一.用准备好的 四块磁盘创建 RAID10
[root@localhost dev]# mdadm --create --auto=yes /dev/md10 --level=10 --raid-devices=4 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
mdadm: /dev/sdb1 appears to contain an ext2fs file system
size=2088128K mtime=Wed Apr 20 01:39:41 2011
mdadm: /dev/sdb1 appears to be part of a raid array:
level=raid0 devices=2 ctime=Wed Apr 20 01:35:41 2011
mdadm: /dev/sdc1 appears to be part of a raid array:
level=raid0 devices=2 ctime=Wed Apr 20 01:35:41 2011
mdadm: /dev/sdd1 appears to contain an ext2fs file system
size=2088128K mtime=Wed Apr 20 01:39:41 2011
mdadm: /dev/sdd1 appears to be part of a raid array:
level=raid0 devices=2 ctime=Wed Apr 20 01:36:08 2011
mdadm: /dev/sde1 appears to be part of a raid array:
level=raid0 devices=2 ctime=Wed Apr 20 01:36:08 2011
Continue creating array? y
mdadm: array /dev/md10 started.
查看一下
[root@localhost dev]# cat /proc/mdstat
Personalities : [raid0] [raid10]
md10 : active raid10 sde1[3] sdd1[2] sdc1[1] sdb1[0]
2088192 blocks 64K chunks 2 near-copies [4/4] [UUUU]
[=====>...............] resync = 29.5% (618048/2088192) finish=0.4min speed=51504K/sec
unused devices: <none>
二.格式化刚创建好的raid10
[root@localhost dev]# mkfs -t ext3 /dev/md10
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
261120 inodes, 522048 blocks
26102 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=536870912
16 block groups
32768 blocks per group, 32768 fragments per group
16320 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Writing inode tables: done
Creating journal (8192 blocks):
done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 22 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
[root@localhost dev]#
[root@localhost dev]# cat /proc/mdstat
Personalities : [raid0] [raid10]
md10 : active raid10 sde1[3] sdd1[2] sdc1[1] sdb1[0]
2088192 blocks 64K chunks 2 near-copies [4/4] [UUUU]
[================>....] resync = 84.1% (1758144/2088192) finish=0.1min speed=30868K/sec
unused devices: <none>
三.挂载
[root@localhost dev]# mkdir /media/raid10
[root@localhost dev]# mount /dev/md10 /media/raid10
[root@localhost dev]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 3.8G 2.5G 1.2G 69% /
/dev/sda3 1.5G 87M 1.4G 6% /home
/dev/sda1 46M 11M 33M 25% /boot
tmpfs 252M 0 252M 0% /dev/shm
/dev/md10 2.0G 36M 1.9G 2% /media/raid10
[root@localhost dev]# cat /proc/mdstat
Personalities : [raid0] [raid10]
md10 : active raid10 sde1[3] sdd1[2] sdc1[1] sdb1[0]
2088192 blocks 64K chunks 2 near-copies [4/4] [UUUU]
unused devices: <none>
四.查看
[root@localhost Desktop]# mdadm --detail /dev/md10
/dev/md10:
Version : 0.90
Creation Time : Wed Apr 20 04:46:22 2011
Raid Level : raid10
Array Size : 2088192 (2039.59 MiB 2138.31 MB)
Used Dev Size : 1044096 (1019.80 MiB 1069.15 MB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 10
Persistence : Superblock is persistent
Update Time : Wed Apr 20 04:47:54 2011
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : near=2
Chunk Size : 64K
UUID : d7457594:215c0367:6cd831d4:52469697
Events : 0.4
Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 33 1 active sync /dev/sdc1
2 8 49 2 active sync /dev/sdd1
3 8 65 3 active sync /dev/sde1
五.测试
[root@localhost Desktop]# hdparm -tT /dev/md10
/dev/md10:
Timing cached reads: 2368 MB in 1.99 seconds = 1189.65 MB/sec
Timing buffered disk reads: 114 MB in 3.03 seconds = 37.63 MB/sec
也可以用 dd测试
六.设置开机自动启动RAID,并自动挂载
1.查看UUID号
[root@localhost ~]# mdadm --detail /dev/md10
/dev/md10:
Version : 0.90
Creation Time : Wed Apr 20 18:20:18 2011
Raid Level : raid10
Array Size : 2088192 (2039.59 MiB 2138.31 MB)
Used Dev Size : 1044096 (1019.80 MiB 1069.15 MB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 10
Persistence : Superblock is persistent
Update Time : Wed Apr 20 18:21:39 2011
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : near=2
Chunk Size : 64K
UUID : 090dea92:88bb3482:6a934b67:23713f28
Events : 0.2
Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 33 1 active sync /dev/sdc1
2 8 49 2 active sync /dev/sdd1
3 8 65 3 active sync /dev/sde1
2.添加UUID号到 /etc/mdadm.conf
[root@localhost ~]# vi /etc/mdadm.conf
[root@localhost ~]# more /etc/mdadm.conf
ARRAY /dev/md10 UUID=090dea92:88bb3482:6a934b67:23713f28
3.设置开机自动挂载
[root@localhost ~]# vi /etc/fstab
[root@localhost ~]# more /etc/fstab
LABEL=/ / ext3 defaults 1 1
LABEL=/home /home ext3 defaults 1 2
LABEL=/boot /boot ext3 defaults 1 2
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
LABEL=SWAP-sda5 swap swap defaults 0 0
/dev/md10 /media/raid10 ext3 defaults 1 2
4.查看挂载设备
[root@localhost ~]# ls /media
raid10
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 3.8G 2.5G 1.1G 70% /
/dev/sda3 1.5G 87M 1.4G 6% /home
/dev/sda1 46M 11M 33M 25% /boot
tmpfs 252M 0 252M 0% /dev/shm
/dev/md10 2.0G 36M 1.9G 2% /media/raid10
参考 《鸟哥的Linux私房菜第三版》
《Linux系统管理技术手册第二版》
声明：本文档可以随意更改，但必须署名原作者
作者：凤凰舞者 qq:578989855