The issue probably isn't the HDD data that has been cached by Vcache, but the hardware HDD cache, the HDD cache on the HDD itself. If the HDD gets shut off in a majorly short time, the HDD data may be corrupted, even when the data appeared to have been written to the HDD completely by Windows! Thus with a HDD having an 8MB cache or higher, at 16 MB, HDD corruption is more likely to occur.