Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

SQL Differential Backup

Posted on 2009-07-16
12
288 Views
Last Modified: 2012-05-07
I have a server with serveral SQL databases on it.  They are all in the default instance.  For one specific database I cannot run differential backups.  When I try it says that no full backup is available for the database even if I run a full backup directly prior to running the differential backup.  

Differential backups work with issue on all my other databases.  I am at a loss as to what could be going on.  The full backups appear to run correctly.  The full backups are good.  I can restore them without an issue and all of the data is there.  

It seems like for some reason something within SQL isn't recording that a full backup was done.

Any help is greatly appreciated.  
0
Comment
Question by:willettmeister
  • 7
  • 5
12 Comments
 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24870196
>>  When I try it says that no full backup is available for the database even if I run a full backup directly prior to running the differential backup.

Kindly take Full backup once as mentioned
Differential backup needs a Full backup in place to work.
0
 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24870209
A differential Backup is nothing but the difference between the last Full backup and the current state.

If you haven't took any Full backup then you wont be able to take Differential backup right.
0
 
LVL 11

Author Comment

by:willettmeister
ID: 24870390
Again this occurs even if I run a full backup directly before I run the differential backup.
0
Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24870479
Try the steps below once:

1. Take a Full backup and verify whether it was successfully done by restoring it back to another database.
2. Take a Differential backup and verify whether it was successfully done by restoring it back to the new database created.

Kindly run DBCC CHECKDB to check for any inconsistencies in your database.
0
 
LVL 11

Author Comment

by:willettmeister
ID: 24870558
That is the process that I am following to test the backups.  

I cannot take a differential backup after I take a full backup.  
  The error I get is Connot perform a differential backup for database "db_name" becuase a current database backup does not exist.  

DBCC CHECKDB ran without issue.

CHECKDB found 0 allocation errors and 0 consistency errors in database 'db_name'.
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
0
 
LVL 11

Author Comment

by:willettmeister
ID: 24870573
BTW we use Networker to with the SQL module to perform the backups normally but this occurs if I do backups directly within the SQL management studio also.
0
 
LVL 11

Author Comment

by:willettmeister
ID: 24870626
I have also seen the articles stating that NTbackup breaks the backup chain but that is not what is happening here.  I know for certain that ntbackup is not running in between my full and attempted diff backup.  I have also stopped the SQL VSS writer.
0
 
LVL 11

Author Comment

by:willettmeister
ID: 24870651
i have also checked the msdb.backupset table and the FUll backup is recorded in there correctly.
0
 
LVL 57

Accepted Solution

by:
Raja Jegan R earned 500 total points
ID: 24871130
This should help you out:

http://support.microsoft.com/kb/921106
0
 
LVL 11

Author Comment

by:willettmeister
ID: 24871247
Thanks I have requested the hotfix and I will let you know if it fixes my problem.
0
 
LVL 11

Author Closing Comment

by:willettmeister
ID: 31604279
This hotfix did the trick thanks.
0
 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24877803
Welcome and glad to help you out.
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Ever needed a SQL 2008 Database replicated/mirrored/log shipped on another server but you can't take the downtime inflicted by initial snapshot or disconnect while T-logs are restored or mirror applied? You can use SQL Server Initialize from Backup…
Ever wondered why sometimes your SQL Server is slow or unresponsive with connections spiking up but by the time you go in, all is well? The following article will show you how to install and configure a SQL job that will send you email alerts includ…
Familiarize people with the process of retrieving data from SQL Server using an Access pass-thru query. Microsoft Access is a very powerful client/server development tool. One of the ways that you can retrieve data from a SQL Server is by using a pa…
Via a live example, show how to backup a database, simulate a failure backup the tail of the database transaction log and perform the restore.

808 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question