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5. SQL Restore tasks

5. SQL Restore tasks. Objectives Learn howto recover databases from disaster Contents View database and transaction log backup files Perform a complete data restoration of a user database Recover a database to a specified point in time Restore a database to standby mode using Practicals

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5. SQL Restore tasks

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  1. 5. SQL Restore tasks • Objectives • Learn howto recover databases from disaster • Contents • View database and transaction log backup files • Perform a complete data restoration of a user database • Recover a database to a specified point in time • Restore a database to standby mode using • Practicals • Recover your databases • Summary

  2. Determining the Data Restoration Sequence • msdb database, SQL Server 2000 records the details of the backup and the restore history in the msdb database • which devices or files the backup is stored on, • Who performed the backup, • and at what time. • If the msdb database is damaged, you should restore the msdb database from backup before you restore any user databases. • Check what backups you have in the Management container, right click and select properties or double click and view contents • Use the transact SQL • If you do not have a recent backup of the msdb database or are restoring to another SQL Server 2000 instance. • read each backup file and add the information to the msdb database • Restore msdb history RESTORE LABELONLY FROM gurka RESTORE HEADERONLY FROM gurka RESTORE FILELISTONLY FROM gurka

  3. Retrieving Backup Media Information To retrieve backup media information 1. Ensure that you are logged on to the SelfPacedSQL.MSFT domain controller as Administrator. 2. In the SQL Server Enterprise Manager console tree, expand the default instance, expand the Management container, and then click Backup. The backup devices for this SQL Server 2000 instance are displayed in the details pane. 3. In the details pane, right-click SSEMDBTLogBackup and then click Properties. The Backup Device Properties – SSEMTLogBackup dialog box appears displaying the filename associated with this backup device. 4. Click the View Contents button. The View Backup Media Contents dialog box appears, displaying the contents of the SSEMTLogBackup device. Details regarding three transaction log backup sets appear. 5. Switch to SQL Query Analyzer. 6. On the toolbar, click the Load SQL Script button. The Open Query File dialog box appears. 7. RESTORE LABELONLY FROM gurka RESTORE HEADERONLY FROM gurka RESTORE FILELISTONLY FROM gurka

  4. Back up the transaction log without truncation • Before you attempt to restore a backup to a database that is still functioning, be sure to restrict user access to it. • Disk is intact, software error/smartboy caused damage • disk containing a data file failed, • SQL Server 2000 installation failed • recover data to an earlier point in time. • If a disk containing a data file fails, SQL Server Enterprise Manager will display the database containing the damaged data file as suspect. • If you discover you have a suspect database, you should immediately back up the transaction log without truncation before you attempt any restoration of your dat

  5. Back up the transaction log without truncation, cont. • If you discover you have a suspect database • Backing up the current transaction log (using the Without Truncation option) allows you to recover up to the point of failure. • Goto the Databases container, • right-click the suspect database in the details pane, • point to All Tasks, • and then click Restore Database. • Next, you should replace the failed disk. If your data is using RAID for fault tolerance, all that you need to do is to simply add the new drive to the RAID system.

  6. Begin restoration suspect Database • Goto the Databases container, • right-click the suspect database in the details pane, • point to All Tasks, • and then click Restore Database. • the First Backup To Restore drop-down list allows you to select which backup to try first • You can make a combination of backup sets that you can use to complete the restoration.

  7. Howto restore suspect Database • Goto the Databases container, • right-click the suspect database in the details pane, • point to All Tasks, • and then click Restore Database. • Select options tab • You can choose to leave the database operational, not possible to restore additional transaction logs. • You can choose to leave the database read-only and able to restore additional transaction log files. • You can leave database read only adn able to restore more transaction logs

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