System Administration and IT Infrastructure Services. Week 5: Data Recovery and Backups Solved Correctly

System Administration and IT Infrastructure Services. Week 5: Data Recovery and Backups Solved Correctly How can you recover from an unexpected data loss event? Check all that apply Recover data from damaged devices; If a hard drive or device becomes damaged or fails, you can attempt to recover data using specialized software. If data becomes corrupt or gets deleted, you can also restore the data from backup. restore data from backups Where is it best to store backups, physically? across multiple locations; backups should be stored in multiple physical locations to reduce the risk of a catastrophe causing you to lose your backups. Typically, data would be backed up somewhere locally, and the backups would be replicated and stored off-site. Which of these should be included in your backups? Check all that apply. firewall configurations; Critical data for an organization, like firewall configs and relevant databases, should be included in the backup plans. sales databases What's magnetic tape backup media best suited for? long-term archival data; Magnetic tape media is very cheap, but it's also super slow and inconvenient to retrieve data from. This makes it a good option for archiving old data that won't be needed often. Why is it important to test backups and restoration procedures? Check all that apply. to ensure backups work and data can be restored from them to ensure that relevant data is included in the backups; It's super important to test backups and restore procedures to ensure that they actually work! Backup archives could be corrupt or inconsistent, preventing proper restoration. Restore procedures are just as important to test, to ensure that critical data can be extracted from backups if a disaster strikes. Disaster testing can also reveal any gaps in your backup coverage without risking real-world data loss. Which of the following backup types are most space-efficient? Incremental backups; Incremental backups are the most efficient. While they start with a full backup, on subsequent runs, they only backup the parts of files that have changed since the last run. True or false: You can use a RAID array and use rsync to copy critical data to it for backups. false; RAID isn't a replacement for a backup system. You may use a RAID array as a storage system in your backup server, but copying files to a RAID array won't protect against data corruption or data deletion. What elements should a disaster recovery plan cover? Check all that apply. detection measures preventive measures recovery measures; A disaster recovery plan shouldn't only have recovery procedures; it should include detection measures so that you can be made aware of an incident, along with preventative measures to help avoid a disaster in the first place. Why are detection measures included in a disaster recovery plan? Because it's important to know when a disaster occurs; The sooner you can be alerted that an incident is going on, the quicker you can take measures to stop it. What are good preventative measures to incorporate in your organization? Check all that apply. redundant systems; Having redundant systems is a great preventative measure. If one system fails or goes offline, the secondary system can prevent a complete outage until the primary system can be restored.