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title: Resize an existing virtual disk
description:
published: true
date: 2022-01-20T10:54:10.378Z
date: 2022-01-25T14:07:18.572Z
tags:
editor: markdown
dateCreated: 2021-11-13T11:41:29.087Z
---
> *Section under construction*
{.is-warning}
# Resize a disk
## Introduction
As per the software description : "*qemu-img allows you to create, convert and modify images offline. It can handle all image formats supported by QEMU.*"
Expanding a new disk implies creating a new blank image of the desired size and "copy" the existing disk into this new bigger image using virt-resize.
> In-place expansion is not supported, which mean than a copy of the disk to be expanded has to be created
> *Instructions only applies to Linux guests.*
{.is-info}
## Installation
* On Fedora-related distributions, `virt-resize` is provided by the `guestfs-tools` package :
## Background
```
# dnf install guestfs-tools
```
A virtual machine's disk may have to be resized, typically due to lack of space. This page explains how to do so.
The process involves creating a new blank virtual disk of the desired size and grow the former disk into the new one.
## Usage
* **Create a new disk image**
> *In-place expansion is not supported. A new disk of the desired size has to be created.*
{.is-info}
In-place expansion is not supported. A new disk of the desired size has to be created.
Use the following command to create `phyllome_but_bigger.img`, a disk of 15 GiB
* *Move to the location that contains the existing image*
```
$ qemu-img create -f raw phyllome-bigger.img 15G
cd /var/lib/libvirt/images
```
* **Expand the root partition**
> This command only works if the root partition is located on vda3 and if the disk image filesystem uses EXT4.
* *Create a new disk image*
Use the following command to create a disk of 15 GB called `phyllome-bigger.img`.
```
qemu-img create -f raw phyllome-bigger.img 15G
```
* *Expand the root partition*
> *This command expects the root partition to be located on the vda3 partition. It has only been tested against the `ext4`filesystem.*
{.is-warning}
This command bellow requires root privileges.
```
virt-resize --expand /dev/vda3 phyllome.img phyllome-bigger.img
```
* *The following should appear*
```
# virt-resize --expand /dev/vda3 phyllome.img phyllome_but_bigger.img
[ 0.0] Examining phyllome.img
**********
@ -77,6 +76,18 @@ Resize operation completed with no errors. Before deleting the old disk,
carefully check that the resized disk boots and works correctly.
```
* **Inform your virtual machine to use the new disk**
* *Switch to the new disk for your virtual machine*
*To-do*
## Resources
As per the software description : "*qemu-img allows you to create, convert and modify images offline. It can handle all image formats supported by QEMU.*"
* *Installation*
On Fedora-related distributions, `virt-resize` is provided by the `guestfs-tools` package :
```
# dnf install guestfs-tools
```