One of the major trends in secondary storage has been toward massive capacities using magnetic and optical media.
其中一个主要的趋势，在二级存储已朝着大规模能力用磁性和光学媒体。
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Ask for Digital Media Shredder - magnetic edition for permanently removing data on various magnetic disk storage system such as removable hard drives, ZIP, JAZ and REV type disks.
The term may also refer to the storage of data by the transfer processing system on media such as magnetic tape or disk such that the user may not have direct and immediate access to the data.