阿里云CentOS7挂载SSD云盘的方法

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阿里云购买的第2块云盘默认是不自动挂载的，需要手动配置挂载上。

1.查看SSD云盘

sudo fdisk -l

Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0x635e6c7d

Device Boot Start End Blocks Id System

/dev/vda1 2048 83886079 41942016 83 Linux

Disk /dev/vdb: 107.4 GB, 107374182400 bytes, 209715200 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

可以看到SSD系统已经识别为/dev/vdb。

2.格式化云盘

sudo mkfs.ext4 /dev/vdb

mke2fs 1.42.9 (28-Dec-2013)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

6553600 inodes, 26214400 blocks

1310720 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=2174746624

800 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

Allocating group tables: done

Writing inode tables: done

Creating journal (32768 blocks): done

Writing superblocks and filesystem accounting information: done

3.挂载

sudo mount /dev/vdb /opt

将云盘挂载到/opt目录下。

4.配置开机自动挂载

修改/etc/fstab文件，文件末尾添加：

/dev/vdb /opt ext4 defaults 0 0

5.重启检查

使用：

init 6

优雅的重启系统。

使用：

sudo df -h

Filesystem Size Used Avail Use% Mounted on

/dev/vda1 40G 3.6G 34G 10% /

devtmpfs 1.9G 0 1.9G 0% /dev

tmpfs 1.9G 0 1.9G 0% /dev/shm

tmpfs 1.9G 8.4M 1.9G 1% /run

tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup

/dev/vdb 99G 61M 94G 1% /opt

tmpfs 380M 0 380M 0% /run/user/1000

可以看到系统已挂载了SSD云盘。

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