High capacity, low cost and durability are important goals for cold storage. Data retrieval and response time can be significantly slower for a cold storage system than for devices or systems designed for active data. Media choices for cold storage include tape or low-cost commodity hard disk drives.
Object storage is one of the most common storage system types for cold data. One prominent example of a cloud service that caters to cold storage is Amazon Glacier. Facebook has also devoted considerable attention to the hardware used for a cold storage system through the Open Compute Project.