Dictionary Term

Tiered Storage


Tiered storage is a system of data containment in which electronic storage devices are assigned tiers based upon the cost and sophistication of the physical unit, and in which data is assigned to a particular tier (storage unit) based upon characteristics such as prevalence, security considerations and memory and processing requirements.

Tiered storage varies depending upon the needs of the organization or user/s: from relatively simple, two-tiered systems, to five and six tiered systems. Data can be moved between tiers manually, or can be programmed to migrate automatically.

Sources :

http://www.webopedia.com/TERM/T/tiered_storage.html http://en.wikipedia.org/wiki/Hierarchical_storage_management http://searchstorage.techtarget.com/definition/tiered-storage

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