sector slot

In a hardsectored magnetic disc unit, a slot cut in a sector ring (that rotates with the discs) at the beginning of each sector, it is detected by the sector transducer.; 在硬分［扇］区的磁盘设备中,扇区环(与磁盘一道旋转)上在每个扇区始点所开的孔［ 槽］,该孔由扇区传感器进行检测。