Similarly, you can request Minispy to stop logging data for a particular device.įor more information on file system minifilter design, start with the File System Minifilter Drivers section in the Installable File Systems Design Guide. To observe I/O activity on a device, you must explicitly attach Minispy to that device by using the Minispy user-mode component. The file name of the backup files has the format: .YYYYMMDDhhmmssmmm.If a monitored file is about to be changed, deleted or renamed, a backup copy of the file is performed before the operation begins. When a user can request the recorded information, the recorded information is passed to the user-mode component, which can either output it on screen or log it to a file on disk. Minivers is a Windows file system minifilter driver which monitors changes in files with certain extensions. These callback functions help Minispy record any I/O and transaction activity occurring in the system. The kernel-mode component registers callback functions that correspond to various I/O and transaction operations with the filter manager. Minispy consists of both user-mode and kernel-mode components. Altitudes are allocated and managed by Microsoft. Every minifilter driver has an assigned altitude, which is a unique identifier that determines where the minifilter is loaded relative to other minifilters in the I/O stack. It uses only APIs and DDIs that are included in OneCoreUAP. A filter driver developed to the Filter Manager model is called a minifilter. This sample builds a Universal Windows Driver. The Minispy sample is a tool to monitor and log any I/O and transaction activity that occurs in the system.
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