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.
We estimate her wingspan at 16 feet. Big Bertha is a regular guest at the Manta Ray Experience and is comfortable with close encounters to divers and snorkelers. She can be seen at Manta Heaven and Manta Village. We have seen Big Big Bertha pregnant several times.