magnetic storage medium

美 [mæɡˈnetɪk ˈstɔːrɪdʒ ˈmiːdiəm]英 [mæɡˈnetɪk ˈstɔːrɪdʒ ˈmiːdiəm]

noun

any storage medium in which different patterns of magnetization are used to represent stored bits or bytes of information: the hard disk in you computer is magnetic storage; Synonym: magnetic medium magnetic storage

数据来源：WordNet

1

Packing density : Amount of information which can be stored on a magnetic storage medium .

便笺式存贮器高速暂存存贮器密装度：某个磁体贮存媒介所能盛载的资料数量。
2

Pack : To compress and store data in a magnetic storage medium so as to save storage space . Unpack refers to decompressing .

密装：把数据压缩及贮存于磁体贮存媒介内以节省贮存空间。解开密装是把压缩的数据还原的意思。