Linux磁盘新增分区

Linux新增分区操作

• df命令查看

  # 查看已挂载分区 及 文件系统类型
  snowing@ubuntus:~$ df -T
  Filesystem     Type  1K-blocks     Used Available Use% Mounted on
  /dev/sda2      ext4   57359200 13397076  41016028  25% /
  /dev/sda4      ext4   66708904  4681808  58592704   8% /opt
  /dev/sda3      ext4   47746796 24550508  20738432  55% /home
  /dev/sda1      vfat    1994912     6216   1988696   1% /boot/efi
  /dev/sdb1      ext4  102626232 69108640  28258328  71% /data
  

• lsblk命令查看

  # 查看含未挂载分区 及 文件系统类型(sdb1已挂载, sdb2已格式化, sdb3未格式化)
  snowing@ubuntus:~$ lsblk -f
  NAME   FSTYPE FSVER LABEL UUID                                 FSAVAIL FSUSE% MOUNTPOINTS
  sda                                                                           
  ├─sda1 vfat   FAT32       4638-06AC                               1.9G     0% /boot/efi
  ├─sda2 ext4   1.0         821e27cd-cad3-4482-9206-2c5980b08744   39.1G    23% /
  ├─sda3 ext4   1.0         b5bdb5de-8fd8-4d0a-ac0b-fb2b7379e369   19.8G    51% /home
  └─sda4 ext4   1.0         3beff08b-1684-49e8-ad90-a439802d3a60   55.9G     7% /opt
  sdb                                                                           
  ├─sdb1 ext4   1.0         2041dd2d-0c35-41b3-9870-f4b4aa72b834   26.9G    67% /data
  ├─sdb2 ext4   1.0         8ec0d4a7-eef1-4460-9001-10708ceb1792                
  └─sdb3     
  

• 取消该磁盘下已挂载的分区

  # 1.取消该磁盘下已挂载的分区
  sudo umount /dev/sdb1
  
  # 2.进入该磁盘进行修改操作（本次新增一个分区sdb4）
  sudo fdisk /dev/sdb
  
  # 3.具体操作...
  
  # 4.格式化分区
  sudo mkfs -t ext4 /dev/sdb4
  
  # 5.挂载
  sudo mount /dev/sdb4 /relax
  

• 新增一个分区sdb4的具体操作

  # 进入磁盘
  sudo fdisk /dev/sdb
  
  #  Save & Exit
  w   write table to disk and exit
  q   quit without saving changes
  
  #  Generic
  d   delete a partition
  F   list free unpartitioned space
  l   list known partition types
  n   add a new partition
  p   print the partition table
  t   change a partition type
  v   verify the partition table
  i   print information about a partition
  
  
  # p
  Command (m for help): p
  Disk /dev/sdb: 1.82 TiB, 2000398934016 bytes, 3907029168 sectors
  Disk model: WDC WD20EZRZ-00Z
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disklabel type: gpt
  Disk identifier: E5944D60-E1EF-4788-8747-AFCCDE34C40B
  
  Device          Start        End   Sectors  Size Type
  /dev/sdb1        2048  209717247 209715200  100G Linux filesystem
  /dev/sdb2   209717248 1048578047 838860800  400G Linux filesystem
  /dev/sdb3  1048578048 1258293247 209715200  100G Linux filesystem
  
  # i
  Command (m for help): i
  Selected partition 1
          Device: /dev/sdb1
          Start: 2048
              End: 209717247
          Sectors: 209715200
          Size: 100G
          Type: Linux filesystem
      Type-UUID: 0FC63DAF-8483-4772-8E79-3D69D8477DE4
          UUID: 6DEB6DEE-287F-7B42-B781-122824D5D633
  
  # n
  Command (m for help): n
      # Partition number 默认
      Partition number (3-128, default 3): 
      # First sector     默认
      First sector (1048578048-3907029134, default 1048578048): 
      # Last sector      +100G
      Last sector, +/-sectors or +/-size{K,M,G,T,P} (1048578048-3907029134, default 3907029134): +100G
  
  Created a new partition 3 of type 'Linux filesystem' and of size 100 GiB.
  
  # w
  Command (m for help): w
  
  The partition table has been altered.
  Calling ioctl() to re-read partition table.
  Syncing disks.
  

• 设置开机自动挂载

  sudo vim /etc/fstab
  
  # /data was on /dev/sdb1 during installation
  UUID=dd071222-e498-4475-9019-28adce861b7f /data            ext4    defaults        0       2
  
  # /relax was on /dev/sdb3 during installation
  UUID=6c04638f-2823-45e5-bc35-0c707bf622d3 /relax            ext4    defaults        0       2