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title: Resize an existing virtual disk title: Resize an existing virtual disk
description: description:
published: true published: true
date: 2022-01-20T10:54:10.378Z date: 2022-01-25T14:07:18.572Z
tags: tags:
editor: markdown editor: markdown
dateCreated: 2021-11-13T11:41:29.087Z dateCreated: 2021-11-13T11:41:29.087Z
--- ---
> *Section under construction*
{.is-warning}
# Resize a disk # Resize a disk
## Introduction > *Instructions only applies to Linux guests.*
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
{.is-info} {.is-info}
## Installation
* On Fedora-related distributions, `virt-resize` is provided by the `guestfs-tools` package : ## Background
``` A virtual machine's disk may have to be resized, typically due to lack of space. This page explains how to do so.
# dnf install guestfs-tools
``` The process involves creating a new blank virtual disk of the desired size and grow the former disk into the new one.
## Usage ## 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. * *Move to the location that contains the existing image*
Use the following command to create `phyllome_but_bigger.img`, a disk of 15 GiB
``` ```
$ 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} {.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 [ 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. 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* *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
```