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.
Giant Oceanic Manta Ray (Manta birostris). As its name suggests, the Giant Oceanic Manta Ray is generally larger than its smaller reef resident relatives, with average disc-widths of around 4-5 metres (13-16.5 ft) and in extremely large specimens exceeding 7 metres (23 ft). Large oceanic mantas might weigh up to 2 tonnes (4,440lbs).