![]() This is called cold storage - or sometimes tertiary storage - yet even in this case, secondary storage is still often used as a blanket term to describe all nonprimary storage, including cold storage. Some organizations store archival data in a third tier, separate from the secondary tier and accessed even less frequently. ![]() In general, secondary storage can refer to just about any storage not considered primary storage. In some cases, the term is also used to describe the management of secondary data, either in conjunction with or instead of the hardware on which the data resides. In this scenario, the secondary storage devices might be housed in remote locations, but this isn't a requirement.Īlthough these usages persist today, secondary storage has primarily come to refer to storage that supports data and workloads less critical than those requiring primary storage. The term secondary storage has also been used to describe external storage devices not connected directly to production servers. Any type of memory within the computer was considered primary, and everything connected externally to the computer was considered secondary. Secondary storage has also been distinguished from primary storage based on whether it was external to the computer, as opposed to being an internal component. If a volatile device is disconnected from power, the memory is cleared and all data is lost. Volatile memory requires a constant source of power. ![]() This type of secondary storage stood in contrast to primary storage, which referred to a computer's volatile memory devices such as Random Access Memory ( RAM) or data cache. ![]() Secondary storage might include hard disk drives ( HDDs), solid-state drives ( SSDs), optical disks, USB flash drives, floppy disks or other devices. Initially, it referred to a class of non-volatile media that could store data without always being connected to power. Over the years, the term secondary storage has had different meanings. ![]()
0 Comments
Leave a Reply. |