Callback File System™

Callback File System lets you create virtual file systems and disks that meet your requirements, giving you full control over your data.

Created by: EldoS Corporation

Callback File System consists of the system-level driver and user-mode API.

Driver

File System driver creates a virtual device with application-provided file system and emulates a physical storage.

The driver works on the system level and turns a storage into a "real" disk device with its own file system. The "real disk device" is accessible in read-only and/or read-write mode by any application which uses system file management API.

The driver lets you make the mounted disk visible to the user or hide it from the user.
Unlike CallbackDisk, the driver of Callback File System provides a functionality to create not just your virtual disks, but your own file systems. The driver provides a callback mechanism, which lets you keep your files and file systems wherever you want (i.e. on remote computer, in memory or database tables etc.).

User-mode API

User-mode API is simple and introduces about ten functions, specific to driver management and storage mounting operations. Also the API includes about 20 callback functions (events) which your application must handle to effectively represent a full-featured file system.

The API is needed only for driver and storage manipulation. All file operations can be performed using system file management API or framework-specific classes.

User-mode API is provided as a .NET component for .NET Framework development, a static library with one class for use in C++ and a VCL component for use in Delphi.

Security Features

Callback File System supports various security features. First of all, you can expose the virtual disk to the user by assigning it a drive letter, or you can keep the virtual disk hidden from user's eye (when no drive letter is assigned). Next, Callback File System lets you control what applications or users access the data. Finally, you can support NTFS security functions for files and directories stored within Callback File System.

Supported platforms

The drivers and user-mode API can be used on Windows 2000, Windows XP, Windows 2003 Server, Windows Vista and Windows 2008 Server. Both 32-bit and 64-bit (AMD64 and Itanium) systems are supported.

.NET user mode API requires .NET 1.1, .NET 2.0, .NET 3.0 or .NET 3.5.

Supported development tools

.NET component can be used with Visual Studio 2008, Visual Studio 2005 or Visual Studio .NET 2003.
C++ library can be used with Visual Studio 6 or later.
VCL component is available for Delphi 5 to 2007, BDS 2006 (Delphi and C++ personalities), CodeGear RAD Studio 2007 (Delphi and C++ personalities), C++Builder 5 and 6, C++Builder 2007.

To request more details please Contact Us.

For Linux developers

If you are looking for FUSE For Windows (FUSE is File System In User Space, a Linux library for creating file systems), look no further. Callback File System provides the same functionality on Windows.