Converting Disk from RAW to QCOW2 to Allow For Incremental Backup

KB ID: 4345
Product: Veeam Backup for Red Hat Virtualization
Published: 2022-08-31
Last Modified: 2022-08-31
Get weekly article updates
By subscribing, you are agreeing to have your personal information managed in accordance with the terms of Veeam's Privacy Notice.

Cheers for trusting us with the spot in your mailbox!

Now you’re less likely to miss what’s been brewing in our knowledge base with this weekly digest

error icon

Oops! Something went wrong.

Please try again later.

Purpose

This article documents how to convert a Disk from RAW to QCOW2, allowing Veeam Backup for Red Hat Virtualization to create an incremental backup of the disk.

As documented in the Veeam Backup for Red Hat Virtualization User Guide, Incremental Backup requires that "the disk is formatted in QCOW2 format."

Solution

Starting with oVirt version 4.5, RHV REST API can be used to convert a RAW disk to QCOW2 format.

For more information, review: oVirt REST API documentation - disk - convert POST 

 

Example API request:

curl \
--cacert '/etc/pki/ovirt-engine/ca.pem' \
--user 'admin@internal:mypassword' \
--request POST \
--header 'Version: 4' \
--header 'Content-Type: application/xml' \
--header 'Accept: application/xml' \
--data '
<action>
   <disk>
     <sparse>true</sparse>
     <format>cow</format>
   </disk>
 </action>
' \
https://<myengine.example.com>/ovirt-engine/api/disks/<disk id>/convert

Note:

  • To determine the disk id, in the RHV Administration portal, navigate to Storage > Disks.
  • The operation will be processed in the background.
  • The conversion time depends on the disk size.
  • To check whether the disk format has been changed, you can send a GET request in the following format:
    https://<myengine.example.com>/ovirt-engine/api/disks/<disk id>
    

More information

As an alternate way to convert the disks, back up the VM  that has RAW disks using Veeam Backup for Red Hat Virtualization and then restore the VM disks in the QCOW2 format.
Send Article Feedback
To report a typo on this page, highlight the typo with your mouse and press CTRL + Enter.

Spelling error in text

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Thank you!

Thank you!

Your feedback has been received and will be reviewed.

Oops! Something went wrong.

Please try again later.

KB Feedback/Suggestion

This form is only for KB Feedback/Suggestions, if you need help with the software open a support case

By submitting, you are agreeing to have your personal information managed in accordance with the terms of Veeam's Privacy Notice.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Verify your email to continue your product download
We've sent a verification code to:
  • Incorrect verification code. Please try again.
An email with a verification code was just sent to
Didn't receive the code? Click to resend in sec
Didn't receive the code? Click to resend
Thank you!

Thank you!

Your feedback has been received and will be reviewed.

error icon

Oops! Something went wrong.

Please try again later.