7.4. Backup and recovery

7.4. Backup and recovery

1. Risks posed to data by employees

   • inappropriate usage of devices
     • usbs, ipods, can give viruses
   • network data breaches
     • email- personal data
   • laptop loss/theft
   • lack of education

2. Accommodation

   • existing
     • replacing the damaged equipment with new equipment
   • alternative
     • if building and system damaged
       • find alternative
   • reciprocol site
     • arangements with another org similar with spare capacity
   • standby site
     • cold standby site
       • duplicate system, tested on regularly, not used until disaster
     • hot standby site
       • duplicate system running 'mirror'
     • may not be possible to find a reciporcol partner
     • very expensive

3. Final stage= risk analysis

   • value to the org
   • speed which can be recovered
     • recovery time objective (RTO)
       • reducing time can be expensive
   • data recovery point
     • last point at which data can be recovered

4. Backup options available for large scales

   • failover systems
     • provide continuous service for mission critical services
     • replicated systems
       • provide quick recovery of databases by creating replicate
     • archive
       • no point making constant backups when not changes
   • tape backup
     • portable medium

5. Procedures for recovery of large scale system

   • 1. estimate situation
     • 2. evaluate available resources
       • 3. set up
         • 4. recovery run
           • 5. evaluate result
             • 6. clean up

6. Types of maintenance

   • corrective
   • adaptive
   • perfective