Beyond that, the big problem is that primary storage has a much lower percentage of duplicate data than backup data.

除此之外，最大的问题是，主存储上重复数据所占的比例要比备份数据要低得多。

youdao

Since all data storage writes must be performed synchronously at both locations the solution design must account for IO bandwidth needed between the primary and secondary sites.

由于所有数据存储写必须在两个位置上同步地执行，这种解决方案的设计必须考虑主站点与辅助站点之间所需的 IO 带宽。

youdao

The second capacity management approach to consider is reducing data on primary disk storage via data deduplication or data compression.

第二种容量管理办法可近似地认为是通过重复数据删除或数据压缩来减少主存储磁盘上的数据。

youdao

My specialties include storage technologies applied to Big Data analytics (primary), data management, virtualization, and analysis of storage infrastructure acquisition alternatives.

FORBES: I'm a storage guy focused on Big Data

It is generally believed that these cold storage data centers will use HDDs for primary storage rather than magnetic tape.

FORBES: Adventures in Archiving

This could take several forms but generally involves storing copies of content through the cloud, usually in data centers that are away from the primary storage site.

FORBES: Storage System Trends for 2013 and Beyond