为运行中的 Ubuntu 挂载数据盘

添加磁盘

截图有误, 实际为 200G

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检测磁盘挂载成功

fdisk -l

找到目的磁盘 /dev/vdb

Disk /dev/vdb: 200 GiB, 214748364800 bytes, 419430400 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

格式化磁盘

mkfs.ext4 /dev/vdb

添加挂载点挂载磁盘

mkdir -p /mnt/vdb
mount /dev/vdb /mnt/vdb

检查磁盘

root@u1:/# df -h
Filesystem      Size  Used Avail Use% Mounted on
tmpfs           393M  1.1M  392M   1% /run
/dev/sda3        47G  7.3G   38G  17% /
tmpfs           2.0G     0  2.0G   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
/dev/sda2       2.0G  134M  1.7G   8% /boot
tmpfs           393M  4.0K  393M   1% /run/user/0
/dev/vdb        196G   28K  186G   1% /mnt/vdb

验证磁盘

root@u1:/# cd /mnt/vdb
root@u1:/mnt/vdb# ls -l
total 16
drwx------ 2 root root 16384 May 11 09:22 lost+found
root@u1:/mnt/vdb# echo 'hello' > a.txt
root@u1:/mnt/vdb# ls -l
total 20
-rw-r--r-- 1 root root     6 May 11 09:25 a.txt
drwx------ 2 root root 16384 May 11 09:22 lost+found
root@u1:/mnt/vdb# cat a.txt
hello

开机自动挂载

编辑 /etc/fstab

⚠️

注意 VirtIO 磁盘和 SCSI 磁盘挂载到 /etc/fstab 方式不一样

注意

/dev/vdb /mnt/vdb ext4 defaults 0 2

重启验证

reboot

重启后检查挂载

df -h

root@u2:~# df -h
Filesystem          Size  Used Avail Use% Mounted on
tmpfs               393M  1.1M  392M   1% /run
/dev/sda3            47G  7.3G   38G  17% /
tmpfs               2.0G     0  2.0G   0% /dev/shm
tmpfs               5.0M     0  5.0M   0% /run/lock
/dev/sda2           2.0G  134M  1.7G   8% /boot
192.168.88.88:/nfs  196G     0  186G   0% /mnt/nfs
tmpfs               393M  4.0K  393M   1% /run/user/0