CentOS7 磁盘管理

叁歲伎倆 2021-12-03 06:49 806阅读 0赞

## 一、磁盘查看 ##

### 查看所有磁盘 ###

ll /dev/sd*

不带数字的为磁盘，带数字的为磁盘的分区

![1595409-20190709140219426-186356652.png][]

### 查看所有磁盘的分区情况 ###

fdisk -l

结果

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][]

WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.
    
    Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes, 1953525168 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: gpt
    
    
    #         Start          End    Size  Type            Name
     1         2048   1953525134  931.5G  unknown         ceph data
    WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.
    
    Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes, 1953525168 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: gpt
    
    
    #         Start          End    Size  Type            Name
     1         2048   1953525134  931.5G  unknown         ceph data
    
    Disk /dev/sda: 300.0 GB, 300000000000 bytes, 585937500 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: 0x000de82e
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *        2048     1026047      512000   83  Linux
    /dev/sda2         1026048   585936895   292455424   8e  Linux LVM
    WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.
    
    Disk /dev/sde: 1000.2 GB, 1000204886016 bytes, 1953525168 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: gpt
    
    
    #         Start          End    Size  Type            Name
     1         2048   1953525134  931.5G  unknown         ceph data
    WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.
    
    Disk /dev/sdb: 300.0 GB, 300000000000 bytes, 585937500 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: gpt
    
    
    #         Start          End    Size  Type            Name
     1         2048     62916607     30G  unknown         ceph journal
     2     62916608    125831167     30G  unknown         ceph journal
     3    125831168    188745727     30G  unknown         ceph journal
    
    Disk /dev/mapper/centos-root: 53.7 GB, 53687091200 bytes, 104857600 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 /dev/mapper/centos-swap: 30.0 GB, 30001856512 bytes, 58597376 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 /dev/mapper/centos-home: 215.7 GB, 215721443328 bytes, 421330944 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

## 二、磁盘分区 ##

连接磁盘硬件 -> 对磁盘分区 -> 对分区进行格式化 -> 挂载分区到目录 -> 使用

[https://blog.51cto.com/yueyue207/2072255][https_blog.51cto.com_yueyue207_2072255]

# 对指定磁盘操作
    fdisk /dev/sdc
    
    # 显示帮助
    m
    
    # 显示已有分区
    p
    
    # 删除分区，只有1个分区时，会自动删除已有分区，不用选择
    d
    
    # 创建新的分区
    n

## 三、磁盘挂载 ##

### 查看挂载情况 ###

# 或 lsblk
    lsblk -f

![1595409-20190709141703668-197307758.png][]

### 挂载已格式化的磁盘分区 ###

# 创建目录
    mkdir /home/data2
    
    # 挂载磁盘到该目录
    mount /dev/sdd1 /home/data2/
    
    # 卸载
    umount /dev/sdd1

![1595409-20190709142335650-1981015908.png][]

### 开机自动挂载 ###

# 最后一行为新增挂载
    vim /etc/fstab
    
    #
    # /etc/fstab
    # Created by anaconda on Fri May 17 02:12:54 2019
    #
    # 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
    #
    /dev/mapper/centos-root /                       xfs     defaults        0 0
    UUID=80774ba5-c734-40b3-90ec-5817bd434ce8 /boot xfs     defaults        0 0
    /dev/mapper/centos-home /home                   xfs     defaults        0 0
    /dev/mapper/centos-swap swap                    swap    defaults        0 0
    /dev/sdc1 /home/data                            xfs     defaults        0 0

![1595409-20190709143118400-1711083514.png][]

## 四、已挂载磁盘查看 ##

### 查看已挂载磁盘使用情况 ###

df -h

![1595409-20190709141408918-620115247.png][]

### 查看目录占用容量 ###

![1595409-20190709140836939-1732679262.png][]

--------------------

**[https://blog.csdn.net/qq\_30604989/article/details/81163270][https_blog.csdn.net_qq_30604989_article_details_81163270]**

转载于:https://www.cnblogs.com/jhxxb/p/11157315.html

[1595409-20190709140219426-186356652.png]: /images/20211203/76dd5939a16f4df38805df087170d4eb.png
[ContractedBlock.gif]: https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif
[ExpandedBlockStart.gif]: /images/20211203/5a4060335a4e41df92bd701653f18931.png
[https_blog.51cto.com_yueyue207_2072255]: https://blog.51cto.com/yueyue207/2072255
[1595409-20190709141703668-197307758.png]: /images/20211203/3d70c2f49c014dbeb47c12cd676d48f0.png
[1595409-20190709142335650-1981015908.png]: /images/20211203/1612f1fe6fef42c8a16ec59ff9b8c320.png
[1595409-20190709143118400-1711083514.png]: /images/20211203/06850b8318a8479bbbf1f4346d185ac6.png
[1595409-20190709141408918-620115247.png]: /images/20211203/c5565ba0f03142bfbda41f84a09199ae.png
[1595409-20190709140836939-1732679262.png]: /images/20211203/aa000c67a50c4fc097c586e88743a043.png
[https_blog.csdn.net_qq_30604989_article_details_81163270]: https://blog.csdn.net/qq_30604989/article/details/81163270