Virtualbox Usb Drive Not Showing Upl

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In a computing device, hard disks and CD/DVD drives are connected to a device called a hard disk controller, which drives hard disk operation and data transfers. 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 (1984). Initially, this interface worked only with hard disks, but was later extended to also support CD-ROM drives and other types of removable media. In physical PCs, this standard uses flat ribbon parallel cables with 40 or 80 wires. Each such cable can connect two devices, called device 0 and device 1, to a controller. Typical PCs had two connectors for such cables. As a result, support for up to four IDE devices was most common: primary device 0, primary device 1, secondary device 0, and secondary device 1.


In Oracle VM VirtualBox, each virtual machine may have one IDE controller enabled, which gives you up to four virtual storage devices that you can attach to the machine. By default, one of these virtual storage devices, device 0 on the secondary channel, is preconfigured to be the virtual machine's virtual CD/DVD drive. However, you can change the default setting.


After you have created a new virtual machine with the 
New Virtual Machine
 wizard in VirtualBox Manager, you will typically see one IDE controller in the machine's 
Storage
 settings. The virtual CD/DVD drive will be attached to one of the four ports of this controller.


Like a real SATA controller, Oracle VM VirtualBox's virtual SATA controller operates faster and also consumes fewer CPU resources than the virtual IDE controller. Also, this enables you to connect up to 30 virtual hard disks to one machine instead of just three, when compared to the Oracle VM VirtualBox IDE controller with a DVD drive attached.


The entire SATA controller and the virtual disks attached to it, including those in IDE compatibility mode, will not be seen by OSes that do not have device support for AHCI. In particular, there is no support for AHCI in Windows versions before Windows Vista. Legacy Windows versions such as Windows XP, even with SP3 installed, will not see such disks unless you install additional drivers. It is possible to switch from IDE to SATA after installation by installing the SATA drivers and changing the controller type in the VM 
Settings
 window.


As with the other controller types, a SCSI controller will only be seen by OSes with device support for it. Windows 2003 and later ships with drivers for the LSI Logic controller, while Windows NT 4.0 and Windows 2000 ships with drivers for the BusLogic controller. Windows XP ships with drivers for neither.


As with SATA, the SAS controller will only be seen by OSes with device support for it. In particular, there is no support for SAS in Windows before Windows Vista. So Windows XP, even SP3, will not see such disks unless you install additional drivers.


The 
USB mass storage device class
 is a standard to connect external storage devices like hard disks or flash drives to a host through USB. All major OSes support these devices and ship generic drivers making third-party drivers superfluous. In particular, legacy OSes without support for SATA controllers may benefit from USB mass storage devices.



Virtual I/O Device SCSI
 is a standard to connect virtual storage devices like hard disks or optical drives to a VM. Recent Linux and Windows versions support these devices, but Windows needs additional drivers. Currently virtio-scsi controller support is experimental.





The virtio-scsi controller will only

Virtualbox Usb Drive Not Showing Upl

Ashley Sanchez