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.
shalamov/iStock/Getty Images. The two species of manta rays are the worldâs biggest rays: The giant oceanic manta, at its heftiest, may reach 7 meters (23 feet) from wingtip to wingtip and weigh about 2 tonnes (4,440 pounds), and the reef manta isnât much smaller.