C drive getting Full always

Dear Experts,

In my test  environment Windows server 2012 with Hyper_v  is installed . AD along with Exchange Server 2016 is configured.  My C: drive in exchange server is always getting  full i.e few MB space is left. I had followed the instructions that is mentioned on the below link but still my drive is getting full:-


Please help me to solve this . May be I will face the same issue in my live environment someday.

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Jose Gabriel Ortega CastroEE Solution Guide - CEO Faru Bonon ITCommented:
Are your AD and Exchange Virtualized? or are installed on the physical on the computer?

If they are virtualized, you did nothing.
Since the virtual machines are created by default with  "dynamic disks" so the are going to be expanded as you go.
and if you clean up space on the VM it won't be liberated on the physical machine, at least you turn off the computer, and then enter into the option of the disks, and "compact" each of the disks on the VM. (to regain the hard drive space).

If it's not virtualized you should be getting some MBs from that procedure, but it will get filled eventually since exchange will be always creating logs.

So the solution is to add a new drive and "export" the virtual machines to another drive different than C:\.
jct_777Author Commented:

Both the servers are virtualized.

As per your above advice :-So the solution is to add a new drive and "export" the virtual machines to another drive different than C:\.

I am new and in a learning process  also this is a testing environment can you please advice how to export the virtual machines to another drive different than C:\


Jose Gabriel Ortega CastroEE Solution Guide - CEO Faru Bonon ITCommented:
It's pretty straightforward, just  right-click/export, select path, wait.

Then remove "delete" both and import them in the new path (that you selected in the step1.

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Lee W, MVPTechnology and Business Process AdvisorCommented:
WHY is it getting full?  What folder / files are taking up the space?  If you want to learn how to handle this, STEP 1 is finding out WHY it's getting full.  If it's because of the logs, then you should start backing up your Exchange Server - DON'T enable circular logging - it's not meant as a long term solution, especially in a production environment.  Proper, Exchange-aware backups will clear out the log files.
Jose Gabriel Ortega CastroEE Solution Guide - CEO Faru Bonon ITCommented:
Probably the best way to check why...
or check in the event viewer by urself what are the errors.

I'm assuming that your exchange server took all your free space (also assuming that the disk types of your VMs are dynamically expanding).
and that's why you don't get it full again.
jct_777Author Commented:
Hi ,

With space-sniffer it shows :-

Exchange Server 76.4GB

Lee W, MVPTechnology and Business Process AdvisorCommented:
That's a start, but WHAT in exchange is using the space?  The Exchange Databases?  Log Files?  And why did you put them on C: in the first place?  They should be on their own drive. Filling up the C: drive can create huge problems with Windows too... fill up an Exchange data drive and Exchange is offline, but at least you can boot into Windows and clean things up!

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Dr. KlahnPrincipal Software EngineerCommented:
When I see 76 GB used by Exchange, my first thought is that none of the users are ever deleting old email.

Perhaps a policy that deletes emails still on the server after six months would be palliative.
Scott CSenior EngineerCommented:
First off are you backing up Exchange?  Not backing Exchange will allow the log files to grow and grow.

You may need to turn on Circular logging to get a handle on the issue.  This is not something you want to have in a production environment.

As others have said, Exchange should never be installed on the C drive.  The databases should be on a drive and the log files on another, and ideally, the mail queue should be yet on another.
Turn off the pagefile completely and just allocate the appropriate amount of RAM for the system.  Your system will speed up tremendously and you'll reclaim 8 GB.  Worst case is to limit your pagefile to 2 GB if you allocate 4 GB or 8 GB RAM.  Pagefiles are a holdover from the days when RAM was much more expensive.  It's really not necessary for a server when you can allocate a sufficient amount.
R@f@r P@NC3RVirtualization SpecialistCommented:
Try to restart the server, to validate if the unit frees up space, I have the same inconvenience and with a simple reoccurrence it is solved.
jct_777Author Commented:
Hi ,

Got the free space by moving the existing mailboxes to another new drive as suggested by MAS(MVE)


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