Adjusting a Partition After Enlarging a Block Storage

For Cloud Server

This article describes how to edit a partition after you enlarge block storage in Linux.

After you have increased the block storage of your Cloud Servers, you need to resize the partition manually.

To resize the partition manually:

Install the growpart program.

Ubuntu:
[root@localhost ~]# apt-get update
[root@localhost ~]# apt-get install cloud-initramfs-growroot
CentOS 7, CentOS Stream 8 and CentOS Stream 9:
[root@localhost ~]# yum install cloud-utils-growpart
To list the block of storage that is assigned to the server, enter the following command:
[root@localhost ~]# lsblk
After entering the command, you will be shown all the important information about the existing disks and the assigned block of storage that you have enlarged.

Example:
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 100G 0 disk
├─sda1 8:1 0 512M 0 part /boot
└─sda2 8:2 0 99.5G 0 part
├─centos-root 253:0 0 97.5G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 40G 0 disk
└─sdb1 8:17 0 20G 0 part /mnt/block
sr0 11:0 1 1024M 0 rom
In the above example, the server is assigned a block of storage, the size of which has been increased from 20 GB to 40 GB. This block has the name sdb.
Use the following growpart command to expand the first partition on the Storage block. Note that there is a space between the device name and the partition number.
[root@localhost ~]# growpart /dev/dev/dev_name 1
Example:
[root@localhost ~]# growpart /dev/sdb 1
To customise the ext4 file system, type the following command:
[root@localhost ~]# resize2fs -p /dev/sdb1

If the file system is not enlarged, restart the server. Then enter the command resize2fs -p /dev/sdb1 again.