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The disk class driver creates a PDO and an FDO for the disk as a whole (partition zero), and PDOs for each partition on the disk. After updating the driver, restart your PC and check if the issue is resolved or.
#Usb mass storage driver xp update
Select Update driver and follow the on-screen wizard. The file usbstor.sys is located in the C:WindowsSystem32drivers folder. Find USB Mass Storage Device driver and right-click on it.
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#Usb mass storage driver xp software
The stack above the USB storage port driver is managed in the usual way by the native disk class driver. The process known as USB Mass Storage Class Driver belongs to software Microsoft Windows Operating System by Microsoft (Description: The original usbstor.sys is an important part of Windows and rarely causes problems. Therefore, in this example, the USB storage port driver creates two separate PDOs, one for the Compact Flash device and another for the Smart Media device. In the example depicted in the figure, the USB storage device contains separate slots for a Compact Flash device and a Smart Media device. The USB storage port driver can divide the physical storage device into as many as 16 logical units. The USB storage port driver creates its own functional device object (FDO). Windows supplies a USB storage port driver, usbstor.sys, that serves as an interface between the USB stack and the native Windows storage class drivers. The hub driver detects and enumerates the USB mass storage device and creates a PDO for it. Realtek USB 2.0 Card ReaderUSB Mass Storage DeviceFile: MEDIASLOTO2MICROOZ711V3.0.1.3XPCA41534-1328.exe. The figure only shows one level of hub device objects, but USB allows daisy-chaining of hub devices, so there could potentially be many more hub device objects in the tree. The usbhub.sys driver manages all USB hubs. The port driver enumerates the USB hubs in the system, starting with the root hub. Then, usbport.sys creates an FDO for the host controller. The system loads the port driver, usbport.sys, and its accompanying miniports (not shown in the figure).
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The PCI bus driver enumerates the USB host controller. Starting from the bottom of the figure, the following list describes each device object or device object stack and its associated driver: The following figure shows the device objects that are created for a composite USB mass storage device containing both a Smart Media slot and a Compact Flash slot.ĭevice Object Tree for a Composite USB Mass Storage Device