One of the worst sounds in the world is that awful grinding noise associated with a failing hard drive, followed by a series of clicks. It typically indicates HDD failure is imminent and that you better backup your important data, if it’s not too late already. Hey, it happens, but is bum luck solely to blame? Maybe not—the cloud backup specialists

Source: Hot Hardware – BackBlaze 250 Petabyte HDD Reliability Report Shows 8TB Hard Drives Are Very Reliable