Linux格式化数据盘

一. 运行fdisk -l命令查看实例上的数据盘

注:执行命令后,如果不存在/dev/vdb,表示您的实例没有数据盘。确认数据盘是否已挂载。

二.依次运行以下命令,创建一个分区

  1. 运行fdisk -u /dev/vdb命令分区数据盘。
  2. 输入p查看数据盘的分区情况。
  3. 输入n创建一个新分区
  4. 输入p选择分区类型为主分区
  5. 输入分区编号并按回车键:本示例中,仅创建一个分区,输入1
  6. 输入第一个可用的扇区编号,按回车键采用默认值2048
  7. 输入最后一个扇区编号:本示例中,仅创建一个分区,按回车键采用默认值
  8. 输入p查看该数据盘的规划分区情况
  9. 输入w开始分区,并在完成分区后退出
[root@ecshost~ ]# fdisk -u /dev/vdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x3e60020e.

Command (m for help): p
Disk /dev/vdb: 21.5 GB, 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
Disk label type: dos
Disk identifier: 0x3e60020e
Device Boot Start End Blocks Id System

Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-41943039, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039):
Using default value 41943039
Partition 1 of type Linux and of size 20 GiB is set

Command (m for help): p

Disk /dev/vdb: 21.5 GB, 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
Disk label type: dos
Disk identifier: 0x3e60020e
Device Boot Start End Blocks Id System
/dev/vdb1 2048 41943039 20970496 83 Linux

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

  

三. 运行fdisk -lu /dev/vdb命令查看新分区

如果出现/dev/vdb1的相关信息,表示新分区已创建完成

[root@ecshost~ ]# fdisk -lu /dev/vdb

Disk /dev/vdb: 21.5 GB, 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
Disk label type: dos
Disk identifier: 0x3e60020e

Device Boot Start End Blocks Id System
/dev/vdb1 2048 41943039 20970496 83 Linux

  

四.在新分区上创建一个文件系统

创建一个ext4文件系统

mkfs -t ext4 /dev/vdb1
[root@ecshost~ ]# mkfs -t ext4 /dev/vdb1

mke2fs 1.43.5 (04-Aug-2017)
Creating filesystem with 5242624 4k blocks and 1310720 inodes
Filesystem UUID: 884e1a06-1481-43d6-b1a3-8bccaa03****
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

  

五.向/etc/fstab写入新分区信息,启动开机自动挂载分区  

  1. 运行命令cp /etc/fstab /etc/fstab.bak,备份etc/fstab。

    运行命令echo `blkid /dev/vdb1 | awk '{print $2}' | sed 's/\"//g'` /mnt ext4 defaults 0 0 >> /etc/fstab,向/etc/fstab里写入新分区信息。

   2.如果要把数据盘单独挂载到某个文件夹,例如单独用来存放网页,则将命令中/mnt替换成所需的挂载点路径。

说明

  • 建议在/etc/fstab中使用全局唯一标识符UUID来引用新分区。您可以使用blkid命令获得新分区的UUID。
  • Ubuntu 12.04系统不支持barrier,您需要运行echo '`blkid /dev/vdb1 | awk '{print $3}' | sed 's/\"//g'` /mnt ext4 barrier=0 0 0' >> /etc/fstab命令。

六.运行cat /etc/fstab命令查看/etc/fstab中的新分区信息

  

[root@ecshost~ ]# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Wed Dec 12 07:53:08 2018
#
# 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=d67c3b17-255b-4687-be04-f29190d4**** / ext4 defaults 1 1
UUID=a4c73111-3a33-4569-a90c-b6d2e953**** /mnt ext4 defaults 0 0

  

七.运行mount /dev/vdb1 /mnt命令挂载文件系统

[root@ecshost~ ]# mount /dev/vdb1 /mnt
[root@ecshost~ ]# df -h

Filesystem Size Used Avail Use% Mounted on
/dev/vda1 40G 1.6G 36G 5% /
devtmpfs 234M 0 234M 0% /dev
tmpfs 244M 0 244M 0% /dev/shm
tmpfs 244M 484K 244M 1% /run
tmpfs 244M 0 244M 0% /sys/fs/cgroup
tmpfs 49M 0 49M 0% /run/user/0
/dev/vdb1 20G 45M 19G 1% /mnt

 

转自阿里云:https://help.aliyun.com/document_detail/25426.html?spm=a2c4g.11186623.2.27.7ca944e6GRHwKX#concept-jl1-qzd-wdb

posted @ 2020-11-02 17:51  龙影123  阅读(282)  评论(0)    收藏  举报