2. Vinod Kumar
Technology Evangelist
Microsoft
www.ExtremeExperts.com

3. What We Will Cover
SQL Server Storage Internals
Important SQL Server 2005/2008
Enhancements
Data Recovery Scenarios and
Troubleshooting Techniques

4. Agenda
SQL Server Storage Internals
SQL Server 2005 Enhancements
System Database Recovery
User Database Inaccessible
BACKUP/RESTORE Failures
Database Consistency Errors

5. SQL Server Storage Internals
Database and File States
Resource Database
Catalog Views and System Base Tables
Allocation Structures
Database Checksum
Fast Recovery
Deferred Transactions
Read-Only Compressed Databases

6. Storage Internals

7. BACKUP/RESTORE Enhancements
BACKUP
WITH CHECKSUM
Full-text integrated
RESTORE
VERIFYONLY
WITH CONTINUE_AFTER_ERROR
Page Level Restore

8. DBCC CheckDB Enhancements

9. Data Recovery Scenarios
System Database Recovery
User Database Inaccessible
BACKUP/RESTORE Failures
Database Consistency Failures
Runtime Errors
DBCC CHECKDB Errors

10. System Database Recovery
Recovering Master
Files not available
Rebuild using Setup and Restore (you must reapply fixes)
Recovering Model
Rebuild using Setup (you must reapply fixes)
Recovering MSDB
System can still start but SQLAgent will not
instmsdb.sql not an option (at this time) to build clean

11. System Database Recovery (2)
Recovering Resource Database
Copy the correct version of the files
Rebuild using Setup (you must reapply fixes)
Failure to create tempdb
Server can start as long as primary files can be created
Operating System Reinstallation
SQL Setup can reuse existing system databases

12. System Database Scenarios

13. BACKUP/RESTORE Scenarios

14. DataConsistency Scenarios

15. Summary
SQL Server 2005 greatly enhances data recovery
capabilities
CHECKSUM can help detect problems early
Previous problems may not occur as often (Ex.
Deferred transactions, read-retry)
Nothing substitutes a good backup

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not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS,
IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.