How does a file system or file system filter driver handle PnP, Power Management, and WMI in Windows 2000/XP?
Plug and Play, Power Management, and Windows Management Instrumentation (WMI) are normally handled in a minimal fashion in the Windows 2000/XP file systems. Of course, this does not mean that file systems are prohibited from handling such differences, only that as a matter of course most file systems do not need to be aware of all the PnP, Power Management, and WMI operations available. For physical file systems, and file system filter drivers for those file systems, the most significant PnP operations are those that handle removable devices (which is not to be confused with removable media). A removable device is a device that can be dynamically removed from the system, such as a storage device connected via the USB or bus. In this case, the file system follows a rather specific pattern of behavior (which is not the same as the behavior described in the DDK for the physical storage drivers). Thus, when an FSD receives a plug and play request inquiring as to the state of the device for
