# Resizing Disk - increasing the size

We sometimes resize disks in AWS at [Togai](https://togai.com/). We do this manually. Below is the guide for the same. We only talk about how to ***increase*** the size of a disk, ***not decrease***

Follow these steps 🪜 to increase the size of a disk/volume

1. Do all the steps with the volume attached to the running EC2 instance. All the volumes we use support resizing (increasing the size) of volume while it’s attached to the running EC2 instance. Do check if there are any programs running in the EC2 instance that are dependent on the volume and if it will get affected due to the online resizing of the volume i.e. resizing when it’s attached to the EC2 instance and the EC2 instance is up and running
    
2. Find the volume that needs to be resized in AWS Web Console
    
3. Click on `Modify` to modify the volume size
    
4. Provide the new volume size - greater than the current volume size and then save changes
    
5. Once done, monitor the volume status of the volume to understand and monitor the progress of the volume resize
    
6. Once the volume shows that it’s in use and that it’s not in modifying state (it’s probably moved on to optimizing state / completed ✔️ state), follow the below steps
    
7. Find out the hypervisor type of the instance. Usually, all the instances we use are [Nitro instances](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instance-types.html#ec2-nitro-instances). If not sure, use the below command to find out
    

```bash
aws ec2 describe-instance-types --instance-type <instance_type> --query "InstanceTypes[].Hypervisor"
```

1. SSH into the EC2 instance that the volume is attached to
    
2. Use the following command to find the mount point of the volume and ensure it has no partitions (type `part`) in it / under it
    

```bash
sudo lsblk
```

1. If the volume has partitions, follow [https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/recognize-expanded-volume-linux.html](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/recognize-expanded-volume-linux.html) or else move on to the next step
    
2. Use `df -HT` to know the file system type, size, mount point and usage
    
3. For `xfs` (XFS) file system, use the following command to resize
    

```bash
sudo xfs_growfs -d <mount-point>

# for example

sudo xfs_growfs -d /blah-mount-point
```

1. Use `df -HT` again to check if the resize succeeded 🙂
    

References:

* [https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-modify-volume.html](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-modify-volume.html)
    
* [https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/modify-volume-requirements.html](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/modify-volume-requirements.html)
    
* [https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/requesting-ebs-volume-modifications.html](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/requesting-ebs-volume-modifications.html)
    
* [https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/monitoring-volume-modifications.html](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/monitoring-volume-modifications.html)
    
* [https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/recognize-expanded-volume-linux.html](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/recognize-expanded-volume-linux.html)