The movement of the hard drive's read/write heads over different areas of the disk when accessing fragmented files is slower, compared to accessing the entire contents of a non-fragmented file sequentially without moving the read/write heads to seek other fragments.
The giant oceanic manta ray can grow to a disc size of up to 7 m (23 ft) with a weight of about 1,350 kg (2,980 lb) but average size commonly observed is 4.5 m (15 ft). It is dorsoventrally flattened and has large, triangular pectoral fins on either side of the disc.
This creature has broad wings and a long tail. When these rays are born, they are. between 11 and 18 inches wide. They grow to be between 3 and 4 feet wide, from the. tip of one wing to the tip of another. Adults may weigh as much as 50 pounds or more. These rays are generally brown on top, with a white underside.