1.查看磁盘情况
使用命令fdisk -l # 列出全部磁盘信息
2.创建分区
fdisk /dev/xvde # 对xvde硬盘进行分区
n # 创建一个新分区
p # 创建一个主分区(e为扩展分区)
1 # 1表示第一个主分区
回车 # 从第1柱面开始分区
回车 # 表示整个xvde全写入第1分区(若需要将sdb分为多个分区,此时输入+分区大小)
P # 查看下已创建好的分区
w # 保存并退出
3.创建分区文件系统并格式化磁盘
# mkfs.ext4 /dev/xvde1 # 将xvde1以ext4格式进行格式化
[root@ linuxidc.com ~]# mkfs.ext4 xvde1 mke2fs 1.41.12 (17-May-2010) Could not stat xvde1 --- No such file or directory The device apparently does not exist; did you specify it correctly? [root@ linuxidc.com ~]# mkfs.ext4 /dev/xvde1 mke2fs 1.41.12 (17-May-2010) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 19660800 inodes, 78642183 blocks 3932109 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=4294967296 2400 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616 Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 25 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override.
4.在home目录下面创建文件夹mysql,并且将设备挂载至/home/mysql。
[root@ linuxidc.com home]# mount /dev/xvde1 /home/mysql [root@ linuxidc.com home]# df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda2 36G 2.4G 32G 7% / tmpfs 3.9G 0 3.9G 0% /dev/shm /dev/xvde1 296G 191M 281G 1% /home/mysql
对于Linux系统来说,磁盘xvda和xvde的分区是根据系统启动时识别的先后顺序来排列,这样就会出现一个当主机重启后,出现跳盘的情况,为了避免此情况的发生,就需要我们将磁盘的UUID信息写入fstab文件,将分区与磁盘绑定。
1)通过blkid获得磁盘分区的UUID
1)通过blkid获得磁盘分区的UUID
[root@ linuxidc.com ~]# blkid
/dev/xvda1: UUID="5546dd0c-ef40-451b-b266-df8ef3a49967" TYPE="swap"
/dev/xvda2: UUID="77fc0962-b3cf-400a-8903-0632e077fa09" TYPE="ext3"
/dev/xvde1: UUID="1d17945b-c369-42de-85a8-47217d24d3e5" TYPE="ext4"
2)通过vim /etc/fstab在最后一行添加xvde1的磁盘信息
#
# /etc/fstab
# Created by anaconda on Thu Jan 12 02:47:21 2017
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=77fc0962-b3cf-400a-8903-0632e077fa09 / ext3 defaults 1 1 UUID=5546dd0c-ef40-451b-b266-df8ef3a49967 swap swap defaults 0 0 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 UUID=d17945b-c369-42de-85a8-47217d24d3e5 /home/mysql ext4 defaults 0 0
6.将/var/lib/mysql/下的内容转移至/home/mysql/,并且在/var/lib/下创建mysql的链接,实际目录其实为/home/mysql
[root@ linuxidc.com /]# cd home [root@ linuxidc.com home]# mkdir mysql [root@ linuxidc.com home]# mv /var/lib/mysql/* /home/mysql [root@ linuxidc.com home]# ln /home/mysql /var/lib/mysql
7.验证一下,通过df命令查看磁盘的使用情况。然后进入mysql命令,创建数据库test1...,执行之后会在/home/mysql/文件夹下出现数据库test1,另外使用df命令查看磁盘使用情况。会发现/dev/xvde1使用量在增长。
[root@ linuxidc.com mysql]# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/xvda2 37155392 2417608 32850400 7% / tmpfs 4018012 0 4018012 0% /dev/shm /dev/xvde1 309633052 217092 293687524 1% /home/mysql