Class 2 – Write Protect protects the user’s device from unauthorized writing. In a conventional write protect scheme, some operating systems would fail to boot, and the user cannot retrieve information and messages about the OS as it is not allowed to write information back. Apacer implements the Virtual Write scheme that allows write commands to go through the flash controller and temporarily store data. The OS can function normally but since the whole process is virtual, no data has been actually written into the flash. When the host system is reset or rebooted, all the temporarily stored data will be lost and nowhere to be found in the system. Since the Virtual Write scheme runs at device level, it requires no software or driver installation and is independent from the host OS.