mass storage system (MSS)

Any storage with more than about a terabit (1012bits) capacity.Such systems,typically,provide rack storage for data cells with means for locating them, moving them to a read/write station,and replacing them after the required locations have been read or written.Systems have been designed with storage cells for a variety of media including photo-digital, laser holograms, magnetic tape cartridge and cassette, and magnetic cards.Access times are, typically,from about three seconds to about twenty seconds.They are used in many large virtual storage systems to hold data that is prestaged to magnetic disc under the control of a separate minicomputer. Also, sometimes,terabit storage.; 容量大于一太拉位(1012位)的任何存儲器。這樣的系統通常對數據單 元提供排架式 存儲,具有對其進行定位、將其傳送到讀/寫站、讀出或寫入所需單元后代替它們的手段。 具有大量存儲單元的系統設計可適用各種媒體,包括光學數字、激光全息照相、磁帶卷 、盒式磁帶以及磁卡。訪問時間通常是3秒到20秒。它們在很多大虛擬存儲系統中用來 保存數據,這些數據在單獨一臺小型機控制下預置到磁盤中。有時也稱作太位存儲器。