CentOS7 磁盘管理

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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

查看所有磁盘的分区情况

fdisk -l

结果

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

# 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

# 保存分区
w

# 退出不保存
q

三、磁盘格式化

mkfs -t xfs -f /dev/sdb1

四、磁盘挂载

查看挂载情况

# 或 lsblk

lsblk -f

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

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  ::

#

# Accessible filesystems, by reference, are maintained under '/dev/disk'

# See man pages fstab(), findfs(), mount() and/or blkid() for more info

#

/dev/mapper/centos-root /                       xfs     defaults

UUID=80774ba5-c734-40b3-90ec-5817bd434ce8 /boot xfs     defaults

/dev/mapper/centos-home /home                   xfs     defaults

/dev/mapper/centos-swap swap                    swap    defaults

/dev/sdc1 /home/data                            xfs     defaults