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.
Please try again later. Swimming next to a manta ray is a great privilege, because she is one of the giants of the ocean, the manta rays can measure eight meters and weigh 1400 kilograms, recently we learned that they are family of sharks. We know very little about the manta ray, they are a mystery, because they can't live in an aquarium. The greatest danger to the manta ray is the fishing harpoon. But the manta rays are still a really mistery.