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TASK 4The disasters are inevitable in nature due to their unpredictability and their variations. Therefore,the best practices for the organisations is to have a disaster recovery plan in order to return to thenormal states as soon as possible. Any abruption or disruption of the business operationsresulting in the loss of revenue is termed as the disaster in the organisation. In order to minimisethe losses due to disaster, it is imperative to have a recovery plan by the organisation and theirbusiness subsystems (Phillips, B. D., 2015). There is various ways and method for recovering thedata or the company from the disaster. These steps and measures are highly critical for thecompany especially in the case of disaster. Some of the methods which can assist the company inrecovering from the disasters are mentioned below:1.Backup systems: The Disaster Recovery (DR) has various components, and the basicone deals with moving of data from the primary to the secondary data centre. Thisprocess was called backing up of the data to shipping tapes offsite. A replication softwareis used on the host, disk backup appliance, array along with the disk backup appliance forcopying data in an intelligent manner to the secondary site using the WAN. Replicationhas been used by many data centres, but it is managed separately due to the absence ofintegration of the backup software. In the current global world, the DR has beenintegrated directly into the process of backup of the data. Disaster recovery has emergedout as a feature with the backup product instead of being a different and unique productwhich requires separate management. The process of virtualization has helped a greatdeal in lowering the cost of hardware in the DR site (Nicolini, M. J., Wildes, R. A.,Slawsky, J. E., Sabjan, C. A., Alexander, J. W., Freiheit, K., & Gregory, R. D. I., 2015).
One of the best practices among the backup method is the choice of “virtual cloud”. The data isstored on the virtual choice in the offsite where the BDR features are provided which were notavailable to the various organisation when they used traditional disk arrays. The transfer of datais made faster with high speed with the development of the cloud backup. The process is betterthan the disk arrays and has proved out to be more useful than other available technologies. Theprocess of cloud backup has allowed an automated recovery along with verification. In the caseof high demand, the use of VMs (virtual machines) is operated on demand. These VMs or virtualmachines can easily act as storage and also integrate with other backup options like hard diskarrays while using the network attached storage (NAS) and also have the ability to operatewholly on their remote server. Their virtual servers are also beneficial in offering superiorresponse times when compared to the traditional disk-based solutions when the assets and dataare retrieved. These VMs are also termed as cloud servers and are available in multiple OSconfigurations and scaled in real-time dynamically.The cloud backup is seen to come in two forms. The primary form is the one with the localbackup appliance which can easily replicate the data using the software to the cloud. The wholeprocess is seen to allow users in the retaining of their local backup of the data with fasterrestoring while the older data is sent to the cloud. There are also direct-to-cloud backups whichare seen to allow various systems to send the data simultaneously to the cloud. However, thisprocess requires installing an agent in the individual system (Xiao, Z., Song, W., & Chen, Q.,2013). Further, the on-site copy is not retained for faster restores. In either of the cases, it is seenthat the whole process is fulfilling the basic necessity of the DR where the data is secured in thesecondary site.2. Whole system replacement:
The whole system replacements are termed as the method of recovering or replacement of thewhole processing system of the organisation. Whole system replacements in the organisation arehighly expensive. All the organisation avoid adopting to this solution in order to avoid the costsand commercial burden. Further, the organisations are also exposed to have an ineffective planon the basis of the possibility of the disaster occurring (Chang, V., 2015).However, the cases where the network is badly damaged, there is a need to replace the wholesystem as soon as the data is not lost. Most of the organisations are seen to have a contract with acompany called Darksite. The company is responsible for replacing the whole network in casethe installed network is seen to fail. This process is seen to have performed every single trick andprocess to save the data, but the organisation feels the need to start again from scratch. Thisoption is usually considered to be the last resort when all the functions and operations havefailed.3. Tiers of disaster recoveryThe seven tiers of disaster recovery were defined for identifying the various methods which canrecover the mission-critical computer systems for supporting the business continuity. The Tierswere assigned from 0 to 7.Tier 0: No off-site data – Possibly no recoveryThe organisations having a Tier 0 business continuity solutions are seen to have none of thebusiness continuity plans. The organisations do not have any documentation, information,contingency plan or backup hardware. Therefore it is impossible to recover data for suchorganisations.