1. Add disk to virtual machine
The virtual machine must be shut down first, otherwise the Add button will not be visible.
9
Adding disks to vm is complete.
2. Log in to the virtual machine to mount the disk
1、lsblk
Check the hard disk mounting status, sdb is the newly mounted disk.
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 100G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 99G 0 part
├─centos-root 253:0 0 50G 0 lvm /
├─centos-swap 253:1 0 7.9G 0 lvm [SWAP]
└─centos-home 253:2 0 41.1G 0 lvm /home
sdb 8:16 0 40G 0 disk
sr0 11:0 1 1024M 0 rom
2. fdisk -l
View the partition situation before mounting
[root@localhost ~]# fdisk -l
磁盘 /dev/sda:107.4 GB, 107374182400 字节,209715200 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘标签类型:dos
磁盘标识符:0x0000d223
设备 Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 209715199 103808000 8e Linux LVM
磁盘 /dev/sdb:42.9 GB, 42949672960 字节,83886080 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘 /dev/mapper/centos-root:53.7 GB, 53687091200 字节,104857600 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘 /dev/mapper/centos-swap:8455 MB, 8455716864 字节,16515072 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘 /dev/mapper/centos-home:44.1 GB, 44149243904 字节,86228992 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
Inside the red box is the newly added disk.
3. Create partition fdisk /dev/sdb for the new hard disk
The terminal will prompt:
Command (m for help): Type: n
Enter p followed by 1
Then it will prompt the start address and end address of the volume, keep the default and press Enter (meaning only one area)
Type "w" to save and exit.
[root@localhost ~]# fdisk /dev/sdb
欢迎使用 fdisk (util-linux 2.23.2)。
更改将停留在内存中,直到您决定将更改写入磁盘。
使用写入命令前请三思。
Device does not contain a recognized partition table
使用磁盘标识符 0x7e4902f0 创建新的 DOS 磁盘标签。
命令(输入 m 获取帮助):n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
分区号 (1-4,默认 1):1
起始 扇区 (2048-83886079,默认为 2048):
将使用默认值 2048
Last 扇区, +扇区 or +size{K,M,G} (2048-83886079,默认为 83886079):
将使用默认值 83886079
分区 1 已设置为 Linux 类型,大小设为 40 GiB
命令(输入 m 获取帮助):w
The partition table has been altered!
Calling ioctl() to re-read partition table.
正在同步磁盘。
4. Use fdisk -l to view again, and /dev/sdb1 appears, indicating that the partition work is completed;
5. mkfs -t ext3 /dev/sdb1
Format the new area
6、sblk
List all available device block information
7. vgdisplay -v
View volume grouping
\
8. pvcreate /dev/sdb1
Create a physical volume
9. pvdisplay
View the creation results
10. vgextend centos /dev/sdb1
Expand the volume group, which centos
is the VG Name in step 7
11. lvextend -L +40G /dev/centos/root
Extend logical volume
12. xfs_growfs /dev/centos/root
Synchronize file system
13. df -h
Check the mount status again
The above disk is mounted successfully.