SBS 2008 disk space usage expands to fill available space

I am running SBS 2008 with 3-users on Vmware ESXI.    I am seeing a behavior which I can only describe as disk space usage on c:\ seems to expand to almost fill available space?  

A few months ago I noticed that available space on c:\ was < 8 Gigs.   Because I'm running on vmware, I was able to provision additional storage from a datastore and use server 08's normal disk management tools to expand the disk by 10 gigs.   After doing so, I located a few very large log files and deleted them and ran WSUS cleanup.

A month later, I checked disk space again.  Again, it had shrunk to < 8.   I repeated the process of expanding the available space by 20G.  This time there were no large log files to cleanup and WSUS cleared only about 40megs.

I checked again recently and the same thing appears to have happened, available space < 10 G.  Additional gigs of space are now used and I cannot locate what is using them.

The only user data files on c:\ are in exchange and those total about 2G for all 3 users.

One additional step I took this time was to run the SBS built-in backup utility to see if it would delete application logs.   The net disk space result was that available space went down slightly...presumably because of the files created by the backup to record the backup log etc.

There are no findable files much greater than 500 megs in size and only a few at that.

The behavior seems "repeatable" enough to think that there is some single SBS process that is using the space in an "opportunistic" manner.

Any ideas on where the space might be going?

Thanks,

Ken



kflorianAsked:
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withtuConnect With a Mentor Commented:
well, do you install the WSS 3.0 in your sbs2003 box?

check it out to shrink the config database.

http://www.sharepointboris.net/2008/10/sharepoint-config-database-log-file-too-big-reduce-it/
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Coast-ITCommented:
Have you ran treesize locally on the C drive?

http://www.jam-software.com/freeware/index.shtml

this will break down where the space is going.
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boxerenterprisesCommented:
What is the total size of the C: partition?
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kflorianAuthor Commented:
184Gigs with 7.77GB free


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kflorianAuthor Commented:
The one large file I find is this sharepoint LDF.

Sharepoint is installed and running but not being used at this time.

SharePoint_Config_29c26fca-17b8-48c1-9704-b869932abcb6_log.LDF
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boxerenterprisesCommented:
Do you have volume shaddow copy enabled and where are they set to go?
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kflorianAuthor Commented:
Enabled
Storage area c:\
Use limit: 12799
Once daily
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kflorianAuthor Commented:
It was the sharepoint log file but no clue why it grew so large with no "real" activity against sharepoint.
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withtuCommented:
Google has lots of similar cases and MSDN also talked such situation either.
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