一种硬盘存储器设备，其中盘片密封在磁盘驱动器内。密封防止了灰尘和其它粒子的进入，但也限制了驱动器的最大尺寸。

• a type of hard disk storage device in which the disk is hermetically sealed inside its disk drive. The seal prevents the intrusion of dust and other particles but limits the maximum size of the drive