Enable Host IO cache on SATA controller by default

CHANGELOG.md

@@ -9,6 +9,7 @@
   - `vagrant ssh` now works on Solaris, where `IdentitiesOnly` was not
     an available option. [GH-820]
   - Output works properly in the face of broken pipes. [GH-819]
+  - Enable Host IO Cache on the SATA controller by default.
 
 ## 1.0.1 (March 11, 2012)
 

lib/vagrant/action.rb

@@ -54,6 +54,7 @@ module Vagrant
       autoload :ProvisionerCleanup,  'vagrant/action/vm/provisioner_cleanup'
       autoload :PruneNFSExports,     'vagrant/action/vm/prune_nfs_exports'
       autoload :Resume,              'vagrant/action/vm/resume'
+      autoload :SaneDefaults,        'vagrant/action/vm/sane_defaults'
       autoload :ShareFolders,        'vagrant/action/vm/share_folders'
       autoload :SetupPackageFiles,   'vagrant/action/vm/setup_package_files'
       autoload :Suspend,             'vagrant/action/vm/suspend'

lib/vagrant/action/builtin.rb

@@ -46,6 +46,7 @@ module Vagrant
             use VM::HostName
             use VM::ClearNetworkInterfaces
             use VM::Network
+            use VM::SaneDefaults
             use VM::Customize
             use VM::Boot
           end

lib/vagrant/action/vm/sane_defaults.rb

@@ -0,0 +1,29 @@
+module Vagrant
+  module Action
+    module VM
+      # This middleware enforces some sane defaults on the virtualbox
+      # VM which help with performance, stability, and in some cases
+      # behavior.
+      class SaneDefaults
+        def initialize(app, env)
+          @app = app
+        end
+
+        def call(env)
+          # Enable the host IO cache on the sata controller. Note that
+          # if this fails then its not a big deal, so we don't raise any
+          # errors. The Host IO cache vastly improves disk IO performance
+          # for VMs.
+          command = [
+            "storagectl", env[:vm].uuid,
+            "--name", "SATA Controller",
+            "--hostiocache", "on"
+          ]
+          env[:vm].driver.execute_command(command)
+
+          @app.call(env)
+        end
+      end
+    end
+  end
+end