着陆区硬盘上一个设定半径的区域通常在内圈当硬盘断电时为避免磁头和和数据柱道接触的磁头存放区
A set radius area on the hard disk in the landing zone is usually a storage area for the magnetic head in the inner circle to prevent contact between the magnetic head and the data column when the hard disk is powered off
以上为机器翻译结果，长、整句建议使用 人工翻译 。