Configure your usb drive as a raw disk in virtualbox page 105 of the manual

 · Insert the USB Flash drive into the USB port ( or ) of your host machine. Open Oracle VM VirtualBox; Select the virtual machine and shut it down from Oracle VM VirtualBox or from the guest operating system; Right-click on the selected virtual machine and then click Settings and click on the USB. Settings – Virtual Machine; Select the Enable USB Controller and then choose USB . After booting the machine from CD, we plug in and mount an USB hard drive with enough capacity to store the whole internal hard drive. Lets assume that we have mounted USB drive as /store. dd if=/dev/sda of=/store/copy_of_www.doorway.ru Depending on the size of hard drive this may take from minutes to hours. Conversion Conversion is done with VirtualBox utility VBoxManage. VBoxManage Estimated Reading Time: 1 min. It is not passible directly but it is possible indirectly. Configure your USB drive as a raw disk in VirtualBox (page of the manual). Then the guest will see your USB drive as a IDE drive and will be able to boot on it.

Oracle VM VirtualBox can emulate the most common types of hard disk controllers typically found in computing devices: IDE, SATA (AHCI), SCSI, SAS, USB-based, NVMe and virtio-scsi mass storage devices. IDE (ATA) controllers are a backwards-compatible yet very advanced extension of the disk controller in the IBM PC/AT (). The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get your own in 60 seconds. Buy now! Configure your USB drive as a raw disk in VirtualBox (page of the manual). Then the guest will see your USB drive as a IDE drive and will be able to boot on it. VirtualBox的确不支持USB设备直接启动，但能把USB设备当成硬盘间接启动，"raw disk"，看起来原理跟Vmware一样，把它当成硬盘挂就行了。 至于那个"page of the manual"，我已经升级到VirtualBox ，手册是CHM格式没有页码，还好找到了，是在"

There are many and potentially complicated ways in which VirtualBox can provide hard disk space to a VM (see chapter 5, Virtual storage, page 82 for details), but the most common way is to use a large image file on your real hard disk, whose contents VirtualBox presents to your VM as if it were a complete hard disk. Advanced Storage Configuration Using a Raw Host Hard Disk From a Guest Configuring the Hard Disk Vendor Product Data (VPD) Access iSCSI Targets Using Internal Networking Fine Tuning the Oracle VM VirtualBox NAT Engine Configuring the Address of a NAT Network Interface You must setup USB in fstab. Search the The User Manual for USBFS. Without that USB doesnt work. For the Shared Folder: Try to write in uppercase lettes (SDA2) in VBOX and the net use command. You can check connection throught explorer / cionnect network drives, too.