Disaster recovery planning n comprehensive statement

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Disaster Recovery Planning n Comprehensive statement of actions to be taken before, during and after a disruptive event causes loss of Information Systems. n Primary objective is to provide an alternate site and return to primary site in a minimal time frame Goals and Objectives of DRP n Provide an organized way to make decisions if a disruptive event occurs n Reduce confusion and enhance the ability to deal with crisis n Planning and development must occur before the disaster n Objectives: n Protect the company from major computer services failure n Minimize the risk from delays in providing services n Guarantee reliability of standby systems through testing n Minimize decision making required by personnel during a disaster n DRP assumes BIA has been done, now focusing on the steps needed to protect the business. Data Processing Continuity Planning – planning for disaster and creating plans to cope with it Data Recovery plan Maintenance – keeping plans up to date Data Processing Continuity Planning n Mutual Aid Agreements – reciprocal agreement n Arrangement with another company with similar hardware or software configurations n Agreement by both parties, assumes sufficient capacity in time of need (Big Assumption) n Should only be considered if no other options, or perfect partner (i.e. subsidiary) n Advantages: n Very little or no cost n If processing requirements are similar it may be workable n Disadvantages: n Highly unlikely the capacity will exist n Severely limits responsiveness and support Subscription Service n Third party commercial services provide alternate backup and processing facilities n Most common of the implementations. n Three Basic Forms: n Hot Site n Warm Site n Cold Site Hot Site n Requires: n Fully configured facility with electrical power, Heating Ventilation and Air Conditioning (HVAC) n File and print servers and workstations n Applications are installed on the servers n Workstations are kept up to date n Allows walk in with a data restoration and begin full operations in short time n Remote journaling – mirroring transaction processing over high-speed connections may eliminate back up time. n Advantages:
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n 24/7 availability n Exclusivity of use n Immediately available n Supports short and long term outages n Disadvantages: n Most expensive n Requires constant maintenance of hardware, software, data and applications n Adds administrative overhead and can be a strain on resources n Service provider may oversell processing capabilities n Security of hot site, primary site security must be duplicated Warm Site Cross between hot and cold sites n Facility with electrical power, Heating Ventilation and Air Conditioning (HVAC) n File and print servers may not have workstations, software may not be installed n External communications should be installed n Advantages: n Cost – much less than hot n Location – since less control required sites can be more flexible n Resources – resource drain is much lower than hot site Disadvantages: n Difference in time required to be up and running Cold Site
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