生产环境分区做raid

原创

cloves 2015-10-10 16:24:25 博主文章分类：linux基础 ©著作权

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[root@192_168_11_203 tmp]# cat /proc/mdstat 查看做raid情况
Personalities : [raid1]
md0 : active raid1 sdc[1] sdb[0]
      998891520 blocks super 1.2 [2/2] [UU]
      bitmap: 2/8 pages [8KB], 65536KB chunk
unused devices: <none>

[root@192_168_11_203 ~]# fdisk -l
   Disk /dev/sdb: 1023.0 GB, 1022999134208 bytes
   Disk /dev/sdc: 1023.0 GB, 1022999134208 bytes
   Disk /dev/sdd: 899.0 GB, 898999779328 bytes
   Disk /dev/sde: 899.0 GB, 898999779328 bytes
   Disk /dev/sda: 299.0 GB, 298999349248 bytes
   Disk /dev/md0: 1022.9 GB, 1022864916480 bytes

[root@192_168_11_203 ~]# df -h
   Filesystem            Size Used Avail Use% Mounted on
   /dev/sda2              30G 4.8G   24G 17% /
   tmpfs                  64G 4.0K   64G   1% /dev/shm
   /dev/sda1             190M   47M 133M 27% /boot

/dev/md0p1            938G 132G 759G 15% /data    <--- /dev/md0: 1022.9 GB
/dev/sdd1             824G   73M 783G   1% /backup <--- /dev/sdd: 899.0 GB
/dev/sde1             824G   11G 773G   2% /logs    <--- /dev/sde: 899.0 GB
[root@192_168_11_203 ~]# cat /etc/fstab
/dev/md0p1              /data                   ext4    defaults        0 0
/dev/sdd1               /backup                 ext4    defaults        0 0
/dev/sde1               /logs                   ext4    defaults        0 0

###################创建软RAID0
###分区
fdisk /dev/sdb
    n/p/1/+50M/w
fdisk /dev/sdc
    n/p/1/+50M/w
###安装软raid工具
   下载mdadm
      http://download.chinaunix.net/down.php?id=28095&ResourceID=6641&site=1
      tar jxf mdadm-3.0.tar.bz2
      make
      make install

###做软raid
   mdadm -C --verbose /dev/md0 --level=1 --raid-devices=2 /dev/sdb2 /dev/sdc2
   y

###查看是否有:/dev/md0
fdisk -l

###格式化
   mkfs.ext4 /dev/md0
###查看raid信息
mdadm -D /dev/md0
cat /proc/mdstat

###挂载
mkdir /mdata
mount /dev/md0 /mdata
### df -h 查看
/dev/md0         80M 1.6M   74M   3% /mdata