![]() In addition, file system filter drivers must support file system-specific features such as caching, locking, sparse files, disk quotas, compression, security, recoverability, reparse points, and volume mount points. Getting and setting file, directory, and volume information These operations include:Ĭreating, opening, closing, and enumerating files and directories In contrast, a file system filter driver works in conjunction with one or more file systems to manage file I/O operations. For example, a DVD storage driver controls a DVD drive. File system filter drivers are not device driversĪ device driver is a software component that controls a particular hardware I/O device. See Guidelines for Porting Legacy Filter Drivers to port any remaining legacy filters to be minifilter drivers. Additional resourcesĪlong with this documentation and the sample code mentioned above, OSR offers a variety of resources for file system filter development, including seminars and community discussion forums such as the NTFDS forum.Filter developers should develop file system minifilter drivers with Filter Manager support instead of legacy file system filter drivers. Tests for File Systems and File System Filter Drivers are found in the Filter.Driver category of the HCK. To build filter driver solution you need: Visual Studio 2019 16.4 or higher (with all SDK available in additional features) Windows 10 SDK 2.1 or higher WDK 2.1 or higher MSVC v142 C++ Spectre-Mitigation tools (via Visual Studio Installer -> Individual Components). File system filter driver certificationĬertification information for File Systems and File System Filter Drivers is found in the Windows Hardware Lab Kit (HLK). See Windows driver samples for a complete list. File system and filter sample codeĪ number of Windows driver samples are available, including samples for file system development and file system filter driver development. Every minifilter driver has an assigned altitude, which is a unique identifier. The Filter Manager simplifies the development of third-party filter drivers and solves many of the problems with the legacy filter driver model, such as the ability to control load order through an assigned altitude. A filter driver developed to the Filter Manager model is called a minifilter. ![]() Examples of filter drivers include:įilter driver developers use the system-supplied Filter Manager, which provides a framework for developing filter drivers without having to manage all the complexities of file I/O. By intercepting the request before it reaches its intended target, a minifilter can extend or replace functionality provided by the original target of the request. File system filter driversĪ file system filter driver, or minifilter, intercepts requests targeted at a file system or another file system filter driver. If you do need to develop a new file system driver beyond those available in Windows, sample code is available as a model (see below). To that end, this design guide does not cover file system development. Additionally, the Resilient File System (ReFS), available on Windows Server 2012 and later versions, offers scalable large volume support and the ability to detect and correct data corruption on disk.ĭeveloping a new file system driver is almost always unnecessary, and requirements/specifications for new file system drivers are not predictable. A comparison of features for each of these file systems is shown in File System Functionality Comparison. Standard file systems available in Windows include NTFS, ExFAT, UDF, and FAT32. File systemsįile systems in Windows are implemented as file system drivers working above the storage system.Įvery system-supplied file system in Windows is designed to provide reliable data storage with varying features to meet the user's requirements. It contains both Universal Windows Driver. Although Windows has a mechanism to support file system filter drivers. See the programming reference for reference pages. This repo contains driver samples prepared for use with Microsoft Visual Studio and the Windows Driver Kit (WDK). The following drivers are not supported by IBM Spectrum Archive Library Edition. This section of the WDK provides design guidelines related to file systems and filter drivers. The Windows OS file system filter driver refers to a driver that processes input/output (I/O) requests between the highest-level driver and lower-level.
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