id summary reporter owner description type status component version resolution keywords cc guest host 7811 VERR_NOT_SUPPORTED when using raw vmdk on OSX Tinco "When you create a raw disk vmdk image like so: VBoxManage internalcommands createrawvmdk -filename arch_disk1.vmdk -rawdisk /dev/disk2 You get a vmdk file like the one attached. When you select it as a hard disk for a virtual machine, it will throw the following error before booting: VD: error VERR_NOT_SUPPORTED opening image file '/Users/tinco/smurfer2.vmdk' (VERR_NOT_SUPPORTED). VD: error VERR_NOT_SUPPORTED opening image file '/Users/tinco/smurfer2.vmdk' (VERR_NOT_SUPPORTED). Failed to open image '/Users/tinco/smurfer2.vmdk' in read-write mode rc=VERR_NOT_SUPPORTED (VERR_NOT_SUPPORTED). Failed to attach driver below us! Not supported. (VERR_NOT_SUPPORTED). AHCI: Failed to attach drive to Port0 (VERR_NOT_SUPPORTED). Unknown error creating VM (VERR_NOT_SUPPORTED). ## Details Result Code: NS_ERROR_FAILURE (0x80004005) Component: Console Interface: IConsole {6375231a-c17c-464b-92cb-ae9e128d71c3} A work around that works suggested by klaus-vb is to enable ""use host I/O cache"" on the SATA controller""" defect closed other VirtualBox 3.2.12 duplicate other other