Data Availability

By definition, Data Availability is a term attempting to describe products and services that ensure that data continues to be available at a required level of performance in situations ranging from normal through "disastrous". In general, data availability is achieved through redundancy, involving where the data is stored and how it can be reached.

The way in which this is achieved is to design policies to secure information systems, sheltering them from any threat, accidental or intentional. The safety policy making processes, should not interfere with the smooth operation of informational systems, and must comply with the principle of decentralization, replacement existence and the principle of defense in depth. Each case is unique, not only because of the uniqueness of the data to be protected, but mainly because of the nature of the risks that should be eliminated and the parameters that make any business or organization unique.

The determination of the information system security policy should cover the following categories:
● Personnel Issues
● Physical security
● Controlling access to the information system
● Managing hardware and software
● Legal obligations
● Managing security policy
● Structure
● Business continuity plan

When we apply security policies we seek:
● The instructions and protective measures must cover all goods and all functions
● take account of current technological developments
● policies must be able to cover small changes or extensions to the information system with some modifications or additions. In addition there must be clarity, easy understanding, technological independence and suitability for the organization addressed.

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