In cloud computing environments like Amazon Web Services (AWS), it's common to need to increase the size of partitions on instance disks. This might be necessary to accommodate more data, expand available storage space, or simply optimize infrastructure. This guide will provide a step-by-step process on how to increase the partition size on an AWS instance, using a practical example and demonstrating the necessary commands.
Before You Begin: It's recommended to take a snapshot of the disk before starting the partition resizing process. This will help protect your data and allow you to restore the instance to a previous state if needed.
Step by step
Let's assume we have an AWS instance with a root partition of 30GB that we need to increase to 50GB.
Check Current Disk Structure
- Connect to the AWS instance using SSH.
- Run
sudo lsblk
to view the structure of the storage devices.
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme1n1 259:0 0 200G 0 disk /storage
nvme2n1 259:1 0 150G 0 disk
nvme0n1 259:2 0 50G 0 disk
ββnvme0n1p1 259:3 0 30G 0 part /
ββnvme0n1p128 259:4 0 1M 0 part
π‘ NOTE: The root partition (nvme0n1p1) is only using 30GB of the 50GB disk.
Check Current System Usage
- Run
df -hT
to check the current usage of the filesystem.
Filesystem Type Size Used Avail Use% Mounted on
/dev/nvme0n1p1 xfs 30G 3.3G 27G 11% /
/dev/nvme1n1 ext4 197G 87G 101G 47% /storage
Resize the File System
- Since the filesystem is
XFS
, executesudo xfs_growfs -d /
to resize it.
π‘ NOTE: that / is where it is mounted
π‘ NOTE: For ext2/3/4
filesystems, use sudo resize2fs /dev/nvme0n1p1
.
Verify the Final Result:
- After resizing the filesystem, run
df -hT
again to verify the final result.
Filesystem Type Size Used Avail Use% Mounted on
/dev/nvme0n1p1 xfs 50G 3.3G 47G 7% /
/dev/nvme1n1 ext4 197G 88G 101G 47% /storage
π‘ NOTE: Now, the root partition has been successfully extended to 50GB, utilizing all available space on the disk.
Observation
Note on sudo lsblk
Command Output
It appears that the lsblk
command is showing two subpartitions for the root disk (/dev/nvme0n1). This happens when there is a GPT partition table and a partition reserved for BIOS (usually 1MB). The root partition (nvme0n1p1) has been extended to 50GB and is mounted as /. The nvme0n1p128 partition is reserved for BIOS and is not used for storing data. This configuration is common in modern systems using the GPT partition table.
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