backups and DR - Final

backups and DR - Final - IST 346 Backup and Restore...

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IST 346 Backup and Restore Disaster Recovery and Business Continuity
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Backups What are backups? Why do backups? Users delete files, corrupt files, or move them and forget where they put them! Yes this happens. They take time, money, slow down your production system, etc. Archival purposes or legal purposes Drives fail. Even RAID systems. Typically backups are the most taxing (require most system performance) of anything done !!!! 2
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Multiple Types of Backups Image Backups “Classic” Tape Backups Disk-to-disk-to-tape backups (D2D2T) Backup services (backup over the internet)
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4 Making Backups Image Backup Backs up the entire disk contents, OS, apps, data, everything… Can be used for a ‘bare metal restore /recovery’ in the event of a catastrophic failure or a major system ‘oops’ Can be used to ‘clone’ or copy PC’s Simple to perform via specialized software Common applications are: Ghost Backup Exec System Recovery Console. Drive Image XML (free) Storage Guardian
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YouTube Video - BMR Guide to Operating Systems 5
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6 Tape Backups Tape backups are the most common form of backups . Software packages include Backup Exec, Arcserve, TAR (UNIX) or NTbackup (free tool that comes with Windows) Backup Window Amount of time available to backup your files Backup methods: Full backup Backs-up all files. Usually performed once per week. More later Incremental backup Backs-up files that changed since last incremental backup. More later Differential backup Backs-up all file since last full backup. Amount backed up increases every day as more and more files change. More later
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7 Full Backups Full backup All disk contents are backed up. Usually done weekly or can be done daily depending on the volume of data being backed up and the length of the “backup window”. Clears archive bit or attribute Needed later for incremental backups NOTE : Always consider the restore process if you need to recover files. . what is the easiest and fastest way to get back what you need?
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Incremental vs. Differential 8 Incremental Backup: Backs-up files that have changed since last incremental backup ( or if this is the first incremental backup, since the last full backup ). This is usually done once per day but could be done more often (once in the morning, once in the afternoon, once at night). Clears the archive bit or attribute.
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backups and DR - Final - IST 346 Backup and Restore...

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