CentOS7 磁盘管理

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         

五、已挂载磁盘查看

查看已挂载磁盘使用情况

df -h

查看目录占用容量

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https://blog.csdn.net/qq_30604989/article/details/81163270