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OLVM: Convert image disk format between Raw and Qcow2 (Doc ID 2907863.1)

Last updated on JANUARY 25, 2024

Applies to:

Linux OS - Version Oracle Linux 7.6 with Unbreakable Enterprise Kernel [4.14.35] and later
Linux x86-64

Purpose

For thin provision image on both file based and block based Storage domain, qcow2 format is used by default; for preallocated image on file based Storage domain and block based Storage domain, raw format is used by default.

Raw can use preallocated or thin provisioning allocation on a file based Storage Domain, but only use preallocated allocation on a block based Storage Domain.
Qcow2 uses thin provisioning allocation on both a file based and a block based Storage Domain.

  Thin Provision Preallocated
File Based Raw/QCOW2 Raw
Block Based QCOW2 Raw

 

 

 

Within above restriction, this document describes how to convert image disk format between Raw and Qcow2.

 

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