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 ghost DB file

Author  Topic 

cips
Starting Member

4 Posts

Posted - 2010-04-16 : 16:44:39
Hello.

Greetings to everyone.


Here is my problem: I migrated recently a DB from a SQL 2000 to a 2005 (export/import).
All is working fine, except a strange message I find in the sql server log file:

I/O error 23(error not found) detected during read at offset 0x00000000b88000 in file 'U:\sql\data\msdbdata.mdf'

I find this one time a day. The really strange thing is that this path is not one of the path I'm using to store data files (located on a different disk), so I don't understand from where this message is coming.Nothing is registered in the event viewer. I ran the checkDb on all the DB and no errors were reported. All looks fine, and actually all the DB are running fine. I checked the sys.master_files table, but no evidence of this file.

I'm really puzzled. How can I understand what is causing this error message? How can I track this down?


Thanks for your help.

Cips

Kristen
Test

22859 Posts

Posted - 2010-04-17 : 08:13:36
Scheduled Task? Especially if the error occurs at the same time each day.
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tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2010-04-17 : 13:31:19
I can't explain the ghost file (looks like msdb to me, but you say you checked everything already), but the error indicates you have I/O issues. You should run a chkdsk and also use your vendor's hardware diagnostic tools to verify everything is clean.

You should open a case with Microsoft regarding the ghost file though.

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/

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Kristen
Test

22859 Posts

Posted - 2010-04-17 : 14:53:41
"looks like msdb to me"

Oops! I didn't spot that ...

"I ran the checkDb on all the DB and no errors were reported"

Including the system databases MASTER and MSDB? If not I recommend that you do that.
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cips
Starting Member

4 Posts

Posted - 2010-04-18 : 12:39:05
quote:
Originally posted by Kristen

Scheduled Task? Especially if the error occurs at the same time each day.



Yes, this is what I thought, but what should I look for? I don't find anything pointing to this folder...
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Kristen
Test

22859 Posts

Posted - 2010-04-18 : 14:03:30
Sorry, wasn't clear in my reply. If it happens at, say, 01:15 every day then look for a scheduled task that runs at that time (rather than trying to find one that is referencing that disk location).

Did you do a DBCC CHECKDB on the MSDB & MASTER databases?
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GilaMonster
Master Smack Fu Yak Hacker

4507 Posts

Posted - 2010-04-18 : 14:23:25
Can you query sys.master_files, see if there are any entries with that path.

--
Gail Shaw
SQL Server MVP
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cips
Starting Member

4 Posts

Posted - 2010-04-19 : 04:50:32
quote:
Originally posted by Kristen

Sorry, wasn't clear in my reply. If it happens at, say, 01:15 every day then look for a scheduled task that runs at that time (rather than trying to find one that is referencing that disk location).

Did you do a DBCC CHECKDB on the MSDB & MASTER databases?



Yes, I ran the checkDB on both and 0 errors were reported. I tried to look in scheduled jobs/at jobs, but I can't find anything obvious...
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cips
Starting Member

4 Posts

Posted - 2010-04-19 : 04:52:47
quote:
Originally posted by GilaMonster

Can you query sys.master_files, see if there are any entries with that path.



Yes, I tried, but no evidence of this path there.
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tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2010-04-19 : 13:27:42
Are you able to open a case with Microsoft regarding this issue?

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/

Subscribe to my blog
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