id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host 14425,raw disk access not working on Windows 10 amd64,chryana,,"Using VirtualBox 5.0.x revision 101957 on a Windows 10 amd64 Professional host, I cannot get raw access to some of the partitions on my hard disk, which I was able to get access to on Windows 7 x64 Ultimate, with VirtualBox 4.3.? (a recent 4.3.x build). I had setup two vmdks, one to access two partitions on my system drive (the one Windows is on), and a separate one to access the partition on a separate hard disk (there is only one partition on that disk, Windows doesn't use that disk at all). The boot process fails immediately if I try to boot with the vmdk to access the two partitions on my Windows drive, with the following error messages: {{{ Failed to open a session for the virtual machine debian 64. VD: error VERR_NOT_SUPPORTED opening image file 'C:\Users\user\VirtualBox VMs\debian 64\systemdrive.vmdk' (VERR_NOT_SUPPORTED). VD: error VERR_ACCESS_DENIED opening image file 'C:\Users\user\VirtualBox VMs\debian 64\systemdrive.vmdk' (VERR_ACCESS_DENIED). Failed to open image 'C:\Users\user\VirtualBox VMs\debian 64\systemdrive.vmdk' in read-write mode (VERR_ACCESS_DENIED). Failed to attach driver below us! Access denied. (VERR_ACCESS_DENIED). AHCI: Failed to attach drive to Port3 (VERR_ACCESS_DENIED). Result Code: E_FAIL (0x80004005) Component: ConsoleWrap Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed} }}} If I detach the offending vmdk, and boot with the vmdk to access a separate hard drive, the vm boots fine, as long as I do not access the separate hard drive. Since it's a Linux guest, I mount the separate drive, but as soon as I try to access the data on that drive, the guest hangs. I have attached the VirtualBox logs. VBox.log is the log produced by trying to boot with two attached partitions from the host drive, and VBox.log.2 is the log produced by the vm crashing trying to load the data on a separate disk.",defect,closed,virtual disk,VirtualBox 5.0.0,fixed,raw disk access,,all,Windows