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Exchange 2000 reporting 16GB store when actual mailboxes make up under 4GB?  Where is the space??

electricd7
electricd7 asked
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Last Modified: 2010-03-06
Hello,

First some background.  We are running Exchange 2000 on a Win2k server which used to be part of a large domain.  We have since been sold and are still part of the same domain, although we are now the only members.  Not sure if everything was properly cleaned up at the time of transfer or not.

This morning when I came in, my Exchange store was dismounted and the event log said it had reached its 16GB limit.  I promptly went into the MDBDATA folder and the two files in question were:

priv1.edb 8,695048 KB
priv1.stm 7,553,032 KB

So I ran an offline backup using ESEUtil which took about 3 hours.  After this time, the files were shurnk only by about 4MB.  So i stopped all the services and enabled the extra 1GB using the registry edit.  Next I opened Exhcange System Manager and looked at my mailboxes.  There was nothing sticking out at me, so i added up all the values of the Mailboxes which came up to just under 4GB of space!  Where is the extra 12GB gone?  I am currently running on the extra 1GB with no sign of shrinkage.  I am not sure what to do.  How can I reclaim this space??

I REALLY need to get some space free'd up.  Please help!
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Author

Commented:
I might also add that there are 14GB of .log files in that directory.  Can these be deleted or purged by date or anything??
Top Expert 2006

Commented:
what does event id 1221 tell you?

Author

Commented:
Grr..since I have left someone has purged the App log.  No 1221s left.  It said something about 4MB freed up or in that realm if I remember correctly.

Commented:
When was the last time you did an online backup using some exchange aware program (like ntbackup or some commercial product)? When you do a full online backup those logs will get written to the database and removed.

Author

Commented:
Well that may be the problem.  I use NTBACKUP to do my backups but I am not sure that exchange is seeing it as a full backup.  I use a script to kick off my backup and a .BKS file to tell NTBACKUP what to get, but I don't know how to tell it to backup the exchange stuff properly with this file?  Also, after a full backup is complete, when does it delete those logs (immediately?) and will it shrink the mail store size as well??

Commented:
The log files should be gone when the backup process is complete. Maybe you should try running ntbackup manually and make sure you select the information store in exchange rather than just the files on the harddrive. If you are just backing up the files, the logs won't get purged.

Author

Commented:
OK UPDATE:

I just finished an online backup of exchange.  The log files are now purged, but the mail store remains at 15.4GB.  My question now is if the store is holding old deleted items and not purging them because it hasn't had a backup in sometime?  If this is the case, how can I tell it to go ahead and run deletion based on its retetion policy of sent items and deleted items?  Thanks again!
Top Expert 2006

Commented:
what are the retention settings configured on the mailbox store (you will find it under the mailbox properties under the limits tab)

Author

Commented:
7 days for deleted items and 14 days for deleted mailboxes.  It also has the checkbox for "Do not permantly delete mailboxes until backed up".  So the question is, now that I have done a successful backup, how do I clear up that stuff older than 7 days that is still being held in there??
Top Expert 2006
Commented:
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Commented:
It'll be purged during the next nightly maintenace. So tomorrow morning you should have some more space freed up.
Top Expert 2006

Commented:
jar3817 is correct. it would be purged when the online maintenance runs but the space will not be freed up automatically. you will have to run an offline defrag to reclaim that white space.
check event id 1221 to find out the free space that can be reclaimed with an offline defrag

Author

Commented:
Is there a way to force an online maintenance now so that i can run the offline defrag sooner rather than later?
Expert of the Year 2007
Expert of the Year 2006

Commented:
Simply change its schedule and then leave it to it.
To be honest - if you are going to gain 10gb of space, the online defrag is going to take a while. I doubt whether you will be able to do anything more with it today.

Simon.

Author

Commented:
well i will just let it run its course tonight then.  Im still gonna have 16G taken up by those 2 files though right?  So exchange will still report its over the limit even after the online defrag?
Expert of the Year 2007
Expert of the Year 2006

Commented:
Have you increased the limit?

http://support.microsoft.com/default.aspx?kbid=813051

You need to allow the online defrag to run - otherwise you will not get the space back.

Simon.

Author

Commented:
Yes I have already increased the limit.  The online defrag ran and event 1221 said:

The database "First Storage Group\Mailbox Store (WTHIBEFP1)" has 6155 megabytes of free space after online defragmentation has terminated.

The file size of the 2 files making up the store is still at 15.4 GB however.  Can someone explain this??  If I get another 600MB of mail will the store go offline again??
Top Expert 2006

Commented:
6155 comes to around 6GB of free space that can be claimed with an offline defrag

you have to check the registry setting for increasing the size to 17GB. when you remount the store the settings goes back to 0 to it has to be configured again to 1
Expert of the Year 2007
Expert of the Year 2006

Commented:
Also remember that adding up the mailboxes in ESM will not equal the size of the store. Exchange has a feature known as single instance storage that can make up the difference. There will also be some overhead in the store as well.

Simon.

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