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 dorsal fins are small and at the base of the tail. The largest mantas can reach 1,350 kg (2,980 lb). In both species the width is approximately 2.2 times the length of the body; M. birostris reaches at least 7 m (23 ft) in width while M. alfredi reaches about 5.5 m (18 ft).
California Tiger Salamanders are considerably large for todays amphibians. The male can reach 8.5 inches long and the females 7 inches (NPWRC 2002, FWS 2003). Males differ from females in their overall size as well as their enlarged cloacae during breeding season (FWS 2003).