Data Storage Glossary of Terms

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Definitions from Remote Access to Terabyte (TB)


Remote Access
A feature enabling a “remote” user or piece of equipment to gain access to / the use of resources that are not directly connected to it by a physical means. Examples include the ability to “Dial in” to a server to control it from a distance, or viewing your e-mail from a shared computer via the Internet.
Remote Management
Similar to Remote Access, but more focused. Often only allows access to a pre-determined set of tools to access management features of a device or network.
Remote Mirroring of Data
Remote mirroring is the process of creating an additional copy of written/stored data at a remote location, enabling a more robust disaster recovery environment. This capability is key for a disaster recovery solution that provides for resiliance and access to business critical data.
Replication
Replication is the process of duplicating mission critical data from one highly available site to another.
Restore
A retrieval of data previously backed up to storage media. A restore is performed if data has been lost or corrupted since the backup.
Router
A device that is connected to at least two networks, and administers the data sent between them depending on how it is configured.
SAN – (Storage Area Network)

A high-speed special-purpose network (or sub network) that can interconnect various kinds of data storage devices (usually disks) with associated data servers. This can be useful when providing storage to of a larger network of Users, where the requirements of each server can vary dynamically.

Storage Capacity
The amount of data a server is able to store. It is usually measured in Megabytes (MB), Gigabytes (GB) or Terabytes (TB).
Shadow Copy
A term coined by Microsoft. A “Shadow Copy” is a point–in–time copy of the original data, and is often possible when the data is in use.
Storage Processors
A storage processor (SP) is an intelligent RAID controller (and in some cases, a dedicated computer) that is enclosed within a storage device. They control the allocation and administration of the disks within.
Synchronous Replication
In synchronous replication, each time data is written to the primary disk, the secondary (remote) disk must complete writing the copy before the primary can begin writing the next piece of data.
Terabyte (TB)
A unit of storage measurement, similar in size to approximately 1,000 GB.
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