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Running fsck on a mounted file system can cause the operating system 's buffers to become out of date with respect to the disk . There is little doubt left in the minds of professional biologists that Earth is currently faced with a mounting loss of species that threatens to rival the five great mass extinctions of the geological past . Faced with these conditions , the telecommunications companies have turned to fierce competition and a mounting drive to increase the profits they squeezed from their shrinking workforces . " A clockmaker who turned to making flutes , the innovative Laurent patented his flute-making techniques , including the use of glass for the body of the flute and a mounting system for keys that pioneered the way keys are still mounted on almost all woodwinds today . Devices were then installed on a mounting fixture affixed to the Penn Avenue Bridge .