- مرات التنزيل: 182
- متطلبات التشغيل: Windows 2K/XP/2003/Vista
- الحجم: 2.05 MB
- الاصدار : 0
- اضيف في: 0000-00-00 00:00:00
- اخر تحديث: 23/06/2006
- الموقع علي الانترنت:
With CallbackDisk you can create and manage virtual disk devices within your application and expose these disks to Windows as if they were real disk devices. The disks become visible to all process in the system.
Virtual disk is the one that has a file system on it, but is not physically located on a disk partition.
The storage may be actually located in a file residing on a local disk, or in memory, or in application resources, or somewhere at a remote location.
The important part is that this disk is visible to the user (and to other applications) as if it were a formatted hard disk partition.
CallbackDisk provides a kernel-mode driver, which calls your application when it needs to perform reading or writing to the disk. And your application can store the actual disk data anywhere it needs: in memory, over the net etc.
CallbackDisk consists of the system-level driver and user-mode API:
Virtual disk driver creates a virtual storage device, which emulates a physical storage.
The driver works on the system level and turns a storage into a "real" disk device with it's 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 SolFS Driver Edition SDK, the driver doesn't read or write the data from/to the physical location. Instead, the driver provides a callback mechanism, which lets you keep your data storage wherever you want (i.e. on remote computer, in memory or database record etc.).
· User-mode API
User-mode API is simple and introduces just about ten functions, specific to driver management and storage mounting operations.
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 assembly for .NET development, a library with one class for use in C++ and a component for use in Delphi.
In modern operating systems like Windows, Unix / Linux or Windows Mobile, to create a virtual disk one must develop a kernel-mode driver.
Development of such driver is a complicated task that requires deep knowledge of the operating system internals. Besides complexity, driver development is a very time-consuming process.
To solve these problems we offer CallbackDisk. The product includes ready-to-deploy kernel-mode device driver and a user-mode API, which is used by your application.
The driver creates a virtual disk (you can format this disk to FAT or NTFS) and provide system-wide access to the disk. The API lets you manage the driver and the virtual disk from any Windows or .NET application.
CallbackDisk is based on the same device driver as Solid File System Driver Edition SDK and includes only the basic functionality, necessary to implement a virtual disk.
Virual disk can be needed in many cases. The examples of use are:
· the application stores some data internally (in resources or in supplementary files) and it needs to use some library, which can only work with file located within a system-wide file system. The examples include DirectX libraries, Flash player, many third-party components.
· the application must hide presence of the disk from the user, while keeping it (the disk) available for some applications, and more ...