Utility to flush, one-time or periodically, volume file buffers. Works like sync.exe from Mark Russinovich but enumerates all fixed volumes, including mounted to NTFS Mount Points. A utility to synchronize file data cached in memory with data stored on a disk. FlushVol is an easy-to-use, command-line utility that can synchronize file data cached in memory with disk data. It can help you prevent data loss on a system crash. Using "lazy write" technology to improve disk performance, Windows does not write file data to disk sectors immediately.
Changes are written after a delay but Windows does not guarantee any time interval after that ALL data will be written to disks. Some data are written within 10-20 seconds but other data may leave non-synchronized within minutes or even more. FlushVol allows to synchronize data both automatically and manually.
FlushVol can be installed as a service to perform automatic synchronization with a given interval and to perform manual syncronization, even on non-privileged user request.

The license of this software is Freeware, you can free download and free use this disk management software.