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.
Introduction to Giant Manta Ray. As you can guess from the name, the Giant Manta Ray is considerably large in size. They are dark in color so that they blend in well with their surroundings. They also feature a variety of colorations on the belly that helps to differentiate them from each other.