磁盘挂载与扩容

发表于 更新于 分类于 本文字数： 604 阅读时长 ≈ 2 分钟

普通挂载磁盘扩容

  1. 查看当前磁盘情况 df -Thl

    [root@iz5bg05ape183r0ipx22lrz ~]# df -Thl
    Filesystem     Type      Size  Used Avail Use% Mounted on
    /dev/vda1      ext4       40G   16G   22G  42% /
    devtmpfs       devtmpfs  3.9G     0  3.9G   0% /dev
    tmpfs          tmpfs     3.9G     0  3.9G   0% /dev/shm
    tmpfs          tmpfs     3.9G  580K  3.9G   1% /run
    tmpfs          tmpfs     3.9G     0  3.9G   0% /sys/fs/cgroup
    tmpfs          tmpfs     783M     0  783M   0% /run/user/1001
    tmpfs          tmpfs     783M     0  783M   0% /run/user/0

  2. fdisk -l

vda的文件系统时Linux (Id:83)而不是Linux LVM(Id: 8e)

[root@iz5bg05ape183r0ipx22lrz ~]# 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: 0x0008d73a

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *        2048    83884031    41940992   83  Linux

Disk /dev/vdb: 536.9 GB, 536870912000 bytes, 1048576000 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: 0x6372be6d

   Device Boot      Start         End      Blocks   Id  System
/dev/vdb1            2048  1048575999   524286976   83  Linux
[root@iz5bg05ape183r0ipx22lrz ~]#
  1. 挂载磁盘

fdisk /dev/vdb1
{n, p, size, type, w}
mkfs.ext4 /dev/vdb1
mount /dev/vdb1 /data

  1. 验证挂载
[root@iz5bg05ape183r0ipx22lrz data]# df -Thl
Filesystem     Type      Size  Used Avail Use% Mounted on
/dev/vda1      ext4       40G   16G   22G  42% /
devtmpfs       devtmpfs  3.9G     0  3.9G   0% /dev
tmpfs          tmpfs     3.9G     0  3.9G   0% /dev/shm
tmpfs          tmpfs     3.9G  584K  3.9G   1% /run
tmpfs          tmpfs     3.9G     0  3.9G   0% /sys/fs/cgroup
tmpfs          tmpfs     783M     0  783M   0% /run/user/1001
tmpfs          tmpfs     783M     0  783M   0% /run/user/0
/dev/vdb1      ext4      493G   73M  467G   1% /data
  1. 开机自动挂载
[root@iz5bg05ape183r0ipx22lrz data]# blkid
/dev/vda1: UUID="eb448abb-3012-4d8d-bcde-94434d586a31" TYPE="ext4" 
/dev/vdb1: UUID="a5a8e148-8c6e-49c0-be74-dc1e61fc170f" TYPE="ext4"

vim /etc/fstab
UUID=a5a8e148-8c6e-49c0-be74-dc1e61fc170f /data ext4 defaults 0 0

要挂载的分区设备号 挂载点 文件系统类型 挂载选项 是否备份 是否检测

fdisk单次分区不能超过2T, 超过2T需要使用parted


[root@iz5bg05ape183r0ipx22lrz ~]# part
parted     partprobe  partx      
[root@iz5bg05ape183r0ipx22lrz ~]# parted /dev/vdc 
GNU Parted 3.1
Using /dev/vdc
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p                                                                
Model: Virtio Block Device (virtblk)
Disk /dev/vdc: 3221GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start  End  Size  Type  File system  Flags

(parted) mklabel gpt                                                      
Warning: The existing disk label on /dev/vdc will be destroyed and all data on this disk will be
lost. Do you want to continue?
Yes/No? yes                                                               
(parted) mkpart                                                           
Partition name?  []? vdc1                                                 
File system type?  [ext2]? ext4                                           
Start? 0                                                                  
End? 3221GB                                                               
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? ignore                                                     
(parted) p                                                                
Model: Virtio Block Device (virtblk)
Disk /dev/vdc: 3221GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name  Flags
 1      17.4kB  3221GB  3221GB               vdc1

(parted) quit                                                             
Information: You may need to update /etc/fstab.

[root@iz5bg05ape183r0ipx22lrz ~]#

格式化 vdc1 (上述parted操作也会格式化vdc1)
mkfs.ext4 /dev/vdc1

推荐文章（由hexo文章推荐插件驱动）