vagrant 启动时报错failed to create the raw output file

为了同步家和公司的vagrant box,免不了经常要导入导出box。
然后我手贱换了宿主机上Vagrantfile所在的文件名，然后virtualbox就报错了。

here was an error while executing `VBoxManage`, a CLI used by Vagrant
for controlling VirtualBox. The command and stderr is shown below.

Command: ["startvm", "6333f19c-adb9-4bfb-a72d-0c3aecc4d9f7", "--type", "headless"]

Stderr: VBoxManage.exe: error: RawFile#0 failed to create the raw output file D:/code/oss/vbox/u16/ubuntu-xenial-16.04-cloudimg-console.log (VERR_PATH_NOT_FOUND)
VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component ConsoleWrap, interface IConsole

 幸好在github上找到了解决方法：
https://github.com/joelhandwell/ubuntu_vagrant_boxes/issues/1

在Vagrantfile加virtualbox的配置

config.vm.provider "virtualbox" do |v|
    v.memory = 4096
    v.cpus = 4
    # Basebox ubuntu/xenial64 comes with following Vagrantfile config and causes https://github.com/joelhandwell/ubuntu_vagrant_boxes/issues/1
    # vb.customize [ "modifyvm", :id, "--uart1", "0x3F8", "4" ]
    # vb.customize [ "modifyvm", :id, "--uartmode1", "file", File.join(Dir.pwd, "ubuntu-xenial-16.04-cloudimg-console.log") ]
    # following config will address the issue
    v.customize [ "modifyvm", :id, "--uartmode1", "disconnected" ]
end