sector A sector is the smallest addressable unit on a storage medium. All sequential sectors in a concentric circle are called a track. The sector on a hard disk is usually 512 byte, with the introduction of the logical sector and physical sector the size has become more flexible. See also: HDA overview image. Comments? Let us know! ATAREF/2 (C) 2007-2009 WTY Soft. All rights reserved (legal). |