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the plugins for file based storages * BTRFS * CIFS * Dir * Glusterfs * NFS now allow the option 'preallocation'. 'preallocation' can have four values: * default * off * metadata * falloc * full see man pages for `qemu-img` for what these mean exactly. [0] the defualt value was chosen to be * qcow2: metadata (as previously) * raw: off when using 'metadata' as preallocation mode, for raw images 'off' is used. [0] https://qemu.readthedocs.io/en/latest/system/images.html#disk-image-file-formats Signed-off-by: Lorenz Stechauner <l.stechauner@proxmox.com> Reviewed-by: Fabian Ebner <f.ebner@proxmox.com> Tested-by: Fabian Ebner <f.ebner@proxmox.com>