Virtual Cd-Rom Switching Utility

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Virtual CD-ROM switching utilities are programs to disable the virtual CD-ROM drive found on many devices. A virtual CD-ROM switching utility is a mode switching tool for controlling "flip flop" (multiple device) USB gear. Several new USB devices (especially high-speed wireless WAN stuff, there seems to be a chipset from Qualcomm offering that feature) have their Microsoft Windows device drivers onboard; when plugged in for the first time they act like a USB flash drive and start installing the device driver from there. After that (and on every consecutive plugging) this device driver switches the mode internally, the storage device vanishes (in most cases), and a new device (like a USB modem) shows up. The Wireless WAN (WWAN) gear maker Option calls that feature "ZeroCD (TM)". With USB sniffing programs and libusb it is possible to eavesdrop the communication of the MS Windows device driver, to isolate the command or action that does the switching and to reproduce the same thing under the rule of Linux or the BSD variants.