云服务器分区

• 场景1：公司金山云服务器，由于数据量巨大，数据不能存在默认目录,只能重新挂一块数据盘进行存储，用到了分区
• 场景2：在虚拟环境中做镜像，空间不足，在exsi分配了一块盘给虚拟机后，需要使用本文的内容进行分区，才能使用这块盘

如下，这是云服务器,vdb盘就是还未被分区和使用的盘，如果不分区，是无法使用的。

root@ecs-5295 data]# 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: 0x000a18d3

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1            2048     8194047     4096000   82  Linux swap / Solaris
/dev/vda2   *     8194048    83886079    37846016   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

下面进行分区,根据提示来即可

[root@ecs-5295 data]# fdisk /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 0x0c36caaa.

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 (2048-209715199, default 2048): 2048
Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199): 209715199
Partition 1 of type Linux and of size 100 GiB is set

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

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

这样就分好了，然后进行格式化磁盘

[root@ecs-5295 data]# 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

写入fstab文件

#
# /etc/fstab
# Created by anaconda on Mon Sep  4 16:13:12 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=d3b7747c-23f4-47f5-9b90-eeb6faa412ea /                       ext4    defaults        1 1
UUID=959ab3ee-5bea-44c2-a908-c577a79e5bb9 swap                    swap    defaults        0 0
/dev/vdb                                  /ocloud                 ext4    defaults        0 0

重新加载fstable，并查看磁盘是否加载成功

mount -a
df -h

一般对于云服务器，挂载上，这块盘能用，目的就达到了。

云服务器挂载/dev/vdb磁盘_wzj的博客-CSDN博客_/dev/vdb是什么