mount disk. 挂载磁盘

mount disk

1.分区(new disk)
查看
> fdisk -l
Disk /dev/vda: 60 GiB, 64424509440 bytes, 125829120 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
Disklabel type: dos
Disk identifier: 0xd6804155

Device     Boot Start       End   Sectors Size Id Type
/dev/vda1  *     2048 125827071 125825024  60G 83 Linux


Disk /dev/vdb: 20 GiB, 21474836480 bytes, 41943040 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
Disklabel type: dos
Disk identifier: 0x359c0685

> fdisk /dev/vdb

Welcome to fdisk (util-linux 2.27.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): n
Partition type
   p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-41943039, default 2048): 
Last sector, +sectors or +size{K,M,G,T,P} (2048-41943039, default 41943039): 

Created a new partition 1 of type 'Linux' and of size 20 GiB.

Command (m for help): wq
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.


2.格式化
> fdisk -l
> mkfs -t ext4 /dev/vdb1


3.挂载
方法一,手动挂载,重启不自动挂载:
> mount /dev/vdb1 /tmp/mt
备份数据
> mv docs docs_bak
> mkdir docs
> mount /dev/vdb1 /tmp/mount_test
> cd docs
> cp -r ../docs_bak/* .

方法二,自动挂载,重启后自动挂载:
> vim /etc/fstab
将挂载内容插入到最后
/dev/vdb1       /tmp/mount_test               ext4       defaults              0 0 

> mount -a

4.查看挂载
> df -lh
Filesystem      Size  Used Avail Use% Mounted on
udev            2.0G     0  2.0G   0% /dev
tmpfs           396M  3.1M  393M   1% /run
/dev/vda1        99G   20G   75G  21% /
tmpfs           2.0G  4.0K  2.0G   1% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           2.0G     0  2.0G   0% /sys/fs/cgroup
tmpfs           396M     0  396M   0% /run/user/0
/dev/vdb1       493G  1.5G  466G   1% /tmp/mount_test

PS:
卸载
> vim /etc/fstab
删除要卸载的内容
> umount /tmp/mount_test