Mastering Proxmox - Third Edition

Format

This is a drop-down menu to select the type of disk image. If we select storage that only supports a certain disk type, then this menu option will be greyed out. For example, in our example cluster, we have selected Ceph RBD storage, which can only store .raw images as of Proxmox 5.0. So the format option is greyed out.

If we select the wrong format of disk image or later our requirement changes to using a different format, we can simply use the Move disk option in the Hardware tab to change the format. This can also be done through the CLI using the following command format:

#qemu-img convert -O <type> <source_image> <destination_image>  

If we want to convert a .qcow2 disk image to a .raw image, the command would be as follows: