Article ID: 115479, created on Jan 31, 2013, last review on Jun 17, 2016

  • Applies to:
  • Virtuozzo
  • Virtuozzo containers for Linux


After upgrading from previous versions of Parallels Virtuozzo Containers (PVC)/ Parallels Server Bare Metal (PSBM) to Parallels Cloud Server (PCS), the default container layout remains as VZFS4.

In order to convert existing containers to the new container-in-a-file format (also known as "ploop"), run the following command:

    # vzctl convert CTID --velayout 5

NOTE: the conversion works in online mode since PCS 6.0 update 4. Previously, it was necessary to stop the container before converting it to ploop.

In order to get all new containers created in ploop format by default, follow these steps:

  1. Edit /etc/vz/vz.conf and set VEFSTYPE to ext4:

    # grep VEFSTYPE /etc/vz/vz.conf
  2. Rebuild the OS templates cache:

    # vzpkg update cache

    NOTE: This operation may take a while depending on number of OS templates installed on your server.

Search Words

ploop convert mount

vzfs to ploop

ploop migration convert

converting container to ploop format

convert to ploop


virtuozzo upgrade



0dd5b9380c7d4884d77587f3eb0fa8ef 2897d76d56d2010f4e3a28f864d69223 e8e50b42231236b82df27684e7ec0beb d02f9caf3e11b191a38179103495106f

Email subscription for changes to this article
Save as PDF