View all disk information in the system [root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 50G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 49G 0 part ├─centos-root 253:0 0 47G 0 lvm / └─centos-swap 253:1 0 2G 0 lvm [SWAP] Sdb 8:16 0 20G 0 disk The total capacity of the sdb is 20G. 1G has been allocated to sdb1. The mount point is/disk/disk1 └─sdb1 8:17 0 1G 0 part /disk/disk1 sr0 11:0 1 1024M 0 rom Partition the disk [root@localhost ~]# fdisk /dev/sdb Welcome to fdisk (util linux 2.23.2).
Changes remain in memory until you decide to write them to disk. Think twice before using the write command.
Command (enter m for help): n Partition type: p primary (1 primary, 0 extended, 3 free) e extended Select (default p): p Partition number (2-4, default 2): the default is to directly enter Start sector (2099200-41943039, default is 2099200): the default is to directly enter
The default value 2099200 will be used Last sector,+sector or+size {K, M, G} (2099200-41943039, default is 41943039):+2G gives the partition 2G disk capacity Partition 2 has been set to Linux type, and the size is set to 2 GiB
Command (enter m for help): w Save Format Linux partition [root@localhost ~]# mkfs.ext4 /dev/sdb2 mke2fs 1.42.9 (28-Dec-2013) File System Label= OS type: Linux Block size=4096 (log=2) Block size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 131072 inodes, 524288 blocks 26214 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=536870912 16 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912
Allocating group tables: complete Writing inode table: Done Creating journal (16384 blocks): complete Writing superblocks and filesystem accounting information: complete Mount partition [root@localhost~]#Mkdir/disk/disk2 Create a mount point [root@localhost~]#Mount/dev/sdb2/disk/disk2 Mount the partition on/disk/disk2 Check whether the linux disk is mounted correctly [root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 50G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 49G 0 part ├─centos-root 253:0 0 47G 0 lvm / └─centos-swap 253:1 0 2G 0 lvm [SWAP] sdb 8:16 0 20G 0 disk ├─sdb1 8:17 0 1G 0 part /disk/disk1 ▄ - sdb2 8:18 0 2G 0 part/disk/disk2 When this message appears, it indicates that the partition with 2G capacity we divided has been successfully mounted └─sdb3 8:19 0 4G 0 part Create power on mount /etc/fstab # Created by anaconda on Tue Sep 15 22:40:14 2020 # # 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=b4099324-1543-4953-82ce-44dd626e1635 /boot xfs defaults 0 0 /dev/mapper/centos-swap swap swap defaults 0 0 /dev/sdb1 /disk/disk1 ext4 defaults 0 0 /dev/sdb2/disk/disk2 ext4 defaults 0 0
After modifying the boot configuration file, press ESC and type: wq to save and exit
The command to unload the mounted device in the Linux system: umount/dev/(follow the disk partition here)