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SQL Server 2008
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Data Corruption (SS2K8 / SS2K8 R2)
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Transaction Log Corruption
Transaction Log Corruption
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SQLSACT
SQLSACT
Posted Tuesday, February 05, 2013 7:30 AM
Ten Centuries
Group: General Forum Members
Last Login: Thursday, May 23, 2013 7:48 AM
Points: 1,201,
Visits: 2,126
Hi All
After doing some Research & Testing on corruption, I have a question.
>> Database is corrupt
>> Determined that it's the transaction log that is corrupt. Confirmed this by checking the error log and found "SQL Server detected a logical consistency-based I/O error: incorrect checksum............................ldf"
I am well aware that detaching a corrupt database is not a good thing.
If I know that SQL was shutdown cleanly - Is it then semi-ok to detach the database and then re-attach with attach_rebuild_log ?
Thoughts?
Post #1415834
Jason Deyalsingh
Jason Deyalsingh
Posted Tuesday, February 05, 2013 8:45 AM
Grasshopper
Group: General Forum Members
Last Login: Thursday, February 07, 2013 12:52 PM
Points: 19,
Visits: 70
It's of course risky... but if only the log is corrupted then detaching the db then do a attach single file db *should* work. I'm not saying that you should do this or that it definitely will work....but it should :)
be careful!
Post #1415906
GilaMonster
GilaMonster
Posted Tuesday, February 05, 2013 8:52 AM
SSC-Dedicated
Group: General Forum Members
Last Login: Yesterday @ 3:18 PM
Points: 37,744,
Visits: 30,025
How would you get an incorrect checksum in the log anyway?
Checksums are on database pages in the data file.
There are instances of log corruption, that's not one of them.
Absolutely do not detach and delete the log. Unless you want to convert corrupt and online database into database that won't attach.
Take a look at this article.
http://www.sqlservercentral.com/articles/65804/
and see the list of Do Nots.
Gail Shaw
Microsoft Certified Master: SQL Server 2008, MVP
SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
We walk in the dark places no others will enter
We stand on the bridge and no one may pass
Post #1415912
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