11 disaster recovery chapter 13. chapter 13: disaster recovery2 overview back up server data using...
TRANSCRIPT
Chapter 13: DISASTER RECOVERY 2
OVERVIEW
Back up server data using the Backup utility and the Ntbackup command
Restore data from backup media
Schedule backup jobs
Configure security for backup jobs
Chapter 13: DISASTER RECOVERY 3
OVERVIEW (CONTINUED)
Configure shadow copies and restore previous versions
Create an Active Directory backup
Restore Active Directory using the normal, authoritative, and primary restore methods.
Recover a server using the Recovery Console and Automated System Recovery
Chapter 13: DISASTER RECOVERY 4
DETERMINING A BACKUP STRATEGY
Performing regular backups is one of the most important functions of the system or network administrator.
When developing a backup strategy, ask and answer two questions: Why do we back up data?
Why do we need to back up data?
Chapter 13: DISASTER RECOVERY 5
NORMAL BACKUPS
Backs up all files
Clears the archive bit
Can require large data storage capacity
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INCREMENTAL BACKUPS
Backs up only files that have been modified or created since the last full or incremental backup
Clears the archive bit
Can require considerably less storage space than a normal backup
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DIFFERENTIAL BACKUPS
Backs up only files that have been modified or created since the last full or incremental backup
Does not clear the archive bit
Can require considerably less storage space than a normal backup
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COPY BACKUPS
Backs up all files irrespective of archive bit status
Does not change archive bit status
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DAILY BACKUPS
Backs up files based on today’s date
Does not change archive bit status
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ADVANCED BACKUP AND RESTORE
Volume Shadow Copy service
Backup security
Managing media
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UNDERSTANDING THE VOLUME SHADOW COPY SERVICE
The Volume Shadow Copy service (VSS) enables the following: Allows databases and other files that are
held open or locked because of operator or system activity to be backed up.
Allows applications to continue to write data to a volume during backup.
Chapter 13: DISASTER RECOVERY 14
BACKUP SECURITY
Membership in the Backup Operators group should be closely controlled.
Backup media should be stored and transported in a secure manner.
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SCHEDULING BACKUP JOBS
Scheduling allows backups to be performed during off hours.
Scheduling reduces potential for administrative error.
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SHADOW COPIES OF SHARED FOLDERS
Periodically saves copies of files
Can be used to restore previous versions of a file
Also used by Windows Server 2003 Backup to make copies of open files
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USING SHADOW COPY
Shadow copy allows you to do the following: Recover files that were accidentally deleted
Recover files that were accidentally overwritten
Compare versions of files while working
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BACKING UP AND RESTORING ACTIVE DIRECTORY
The System State object on a domain controller includes Active Directory.
You can back up the system state on a domain controller using the Backup utility or the Ntbackup command.
Chapter 13: DISASTER RECOVERY 24
SCHEDULING ACTIVE DIRECTORY BACKUP OPERATIONS
Like any other backup job, Active Directory backup operations can be scheduled.
Backups should be performed frequently, because information in Active Directory changes often.
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RESTORING ACTIVE DIRECTORY
In some cases it becomes necessary to restore all or part of Active Directory, such as when a server fails or an element of the directory is accidentally deleted.
Active Directory must be restored as part of the System State object. You cannot choose to restore it separately from the other system state components.
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ACTIVE DIRECTORY RESTORE METHODS
Three different methods can be used to restore Active Directory on a domain controller: Normal restore (nonauthoritative)
Authoritative restore
Primary restore
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PERFORMING A NORMAL RESTORE
A normal restore is performed when you want a domain controller to have the latest version of Active Directory information.
Once the restore is completed, the Active Directory replication process updates the information so that it is brought up-to-date.
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PERFORMING AN AUTHORITATIVE RESTORE
An authoritative restore occurs after a normal restore or when a specific part of the directory needs to be restored.
An object marked as authoritative will be replicated to the domain controller’s replication partners.
Authoritative restores are performed using the Ntdsutil utility.
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AUTOMATED SYSTEM RECOVERY
Automated System Recovery (ASR) makes the process of recovering a failed server significantly easier.
ASR creates a floppy disk on which critical system information is stored.
The ASR floppy disk is created by the Automated System Recovery Preparation Wizard, and it is specific to the system and the time at which the ASR set was created.
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SUMMARY
You must have the right to back up and restore files to use the Backup utility or any other backup tool.
Copy backups and daily backups can be used to capture files without interfering with the regular backup schedule.
The Backup utility will also allow you to restore backed-up data to the original location or to an alternate location.
VSS allows a user to access previous versions of files and folders in network shares.
Active Directory can be backed up using the Windows Server 2003 Backup utility.
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SUMMARY (CONTINUED)
Windows Server 2003 supports three methods for restoring system state data: primary, normal, and authoritative restores.
When Active Directory objects that were deleted or misconfigured need to be restored to previous settings, an authoritative restore must be performed.
The system state includes the registry, startup files, COM+ Class Registration Database, and other service-specific critical system files.
The Recovery Console is a text-mode command interpreter that allows you to access the hard disk and services of a computer running Windows Server 2003.
ASR uses a Setup-like process to return a computer to operation, and it starts a restore operation to recover files from the ASR backup set.