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Exchange 2007 server Drive space disappearing

Hi,
I have read most of the similar questions that i can find previously posted. But none seem to quite fit.

My delimma:
Exchange 2007 sp1 rollup 8
c:\ program files, installation files
d:\ 64 GB total, database locations, 2 storeage groups both combined = 27gb
e:\ 30GB total, log file location, = 1.6GB used

Since approximately the 6th of last month, disk space on D:\ has just been disappearing, it is now below 1 GB free space

I have regular scheduled back ups,
ntbackup daily information store, full system once a week
&
commvault 7 sp3 daily database  incremental, weekly synthentic full

Any ideas?
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cplit
Asked:
cplit
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1 Solution
 
grandebobCommented:
Could be snapshots and or shadow copies from your comvault backups.

Also could be a full text index eating up space. Use a utility like Tree Size to see what files are taking up the extra 30 gb.
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cplitAuthor Commented:
I forgot to mention that i have already used Treesize and disk detective, they show that space is being used, but don't show what file/s are consuming the space.
The commvault is using shadow copies.
But i did do an out of sequence full unconditional backup, to try and rule out commvault left overs for this issue.
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cplitAuthor Commented:
I have also just rebuilt the full-text index to elimnate another cause of this error.

{edit to previous post}
The commvault is NOT using shadow copies
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grandebobCommented:
Are you viewing hidden/system files when you do your tree size scan?

What kind of server is it running on? Some manufactures use a "system restore" type of feature that gobble up disk space without telling you.
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cplitAuthor Commented:
Thanks for your help, it was the manufacturers system restore, still was invisible on the D:\, was a reference on c:\ that led me to it.
Cheers
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