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Detailed Table of ContentsOverview............................................................................................................... 2–2What Is a Disaster? ............................................................................................... 2–2Why Plan for a Disaster?.................................................................................... 2–3Planning for a Disaster ....................................................................................... 2–4Creating a Plan...................................................................................................... 2–4What Are the Business Requirements for Disaster Recovery?............................ 2–4Who will provide the requirements?.............................................................................. 2–4What are the requirements?......................................................................................... 2–4When Should a Disaster Recovery Procedure Begin?......................................... 2–5Expected Downtime or Recovery Time................................................................. 2–5Expected Downtime................................................................................................ 2–5Recovery Time........................................................................................................ 2–6Recovery Group and Staffing Roles ..................................................................... 2–6Types of Disaster Recovery .................................................................................. 2–7Onsite ..................................................................................................................... 2–7Offsite ..................................................................................................................... 2–7Disaster Scenarios ................................................................................................ 2–8Three Common Disaster Scenarios...................................................................... 2–8A Corrupt Database................................................................................................ 2–8A Hardware Failure................................................................................................. 2–8A Complete Loss or Destruction of the Server Facility........................................... 2–9Recovery Script ................................................................................................... 2–10Creating a Recovery Script ................................................................................. 2–10Recovery Process ............................................................................................... 2–10Major Steps........................................................................................................... 2–10Crash Kit.............................................................................................................. 2–11Business Continuation During Recovery ............................................................ 2–14Offsite Disaster Recovery Sites .......................................................................... 2–15Integration with your Company’s General Disaster Planning ............................. 2–15When the R/3 System Returns............................................................................ 2–15Test your Disaster Recovery Procedure......................................................... 2–15Other Considerations........................................................................................ 2–16Other Upstream or Downstream Applications..................................................... 2–16Backup Sites........................................................................................................ 2–17Minimizing the Chances for a Disaster........................................................... 2–17Minimize Human Error......................................................................................... 2–17Minimize Single Points of Failure........................................................................ 2–18Cascade Failures ................................................................................................ 2–18 Overview............................................................................................................... 3–2Restore ................................................................................................................. 3–2Strategy ................................................................................................................. 3–2Testing Recovery.................................................................................................... 3–3Backup.................................................................................................................. 3–3What to Backup and When ................................................................................... 3–3Database ................................................................................................................ 3–3Transaction Logs .................................................................................................... 3–5Operating System Level Files................................................................................. 3–6Backup Types........................................................................................................ 3–6What Is Backed Up................................................................................................. 3–7How the Backup Is Taken....................................................................................... 3–8viRelease 4.6A/B