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I have a HP MediaSmart Server (EX 490) with Windows Home Server out of the box. It comes with a single 1.0 TB drive partioned 20 GB for the System disk. The system disk keeps filling up. I haven't installed anything but McAfee. Without getting into the philosophical discussions of why they would partition it thus, what is the likely culprit of this debacle? My D: Partition has plenty of space. I can get into the server only through Remote Desktop.

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I sure hope the system partition is actually 20 GB, not 20 MB :) –  Siim K Dec 8 '10 at 15:45
    
Oops. Yeah it's 20 GB. I'll change that. –  Blanthor Dec 8 '10 at 17:27
    
20GB for C: is normal - WHS doesn't give you a chance to change that. If you are willing to leave the main road, try wiki.wegotserved.com/…. Also, my WHS system partition only uses 8GB. So, things are definitely wrong on yours. –  Jay Bazuzi Dec 9 '10 at 2:54
    
Today, 20GB seems minuscule. At the time, people often had spare 80GB drives lying around that they wanted to use for WHS, so that's the minimum. At RTM, the size of the second partition was critical when copying lots of files to the server, and 60GB was limiting, hence this compromise. (I wish they had raised the minimum system drive size to 160GB instead). Drive Extender was improved in a power pack to get around the limitations at RTM. –  Jay Bazuzi Dec 9 '10 at 3:01
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2 Answers 2

If you have rights to install software onto the machine then I suggest you try WinDirStat or other similar program to visually map what's actually using up the disk space. Then it might be easier to pinpoint the culprit(s) and do something about it.

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I have remoted into the machine, and I'm trying to use WinDirStat portable. Another challenge is that I cannot download anything from SourceForge, even after opening up IE. –  Blanthor Dec 8 '10 at 17:29
    
You could try SequoiaView, it's a direct download. w3.win.tue.nl/nl/onderzoek/onderzoek_informatica/visualization/… –  Siim K Dec 8 '10 at 19:31
    
Somewhere in Internet options there's an option to disallow file download, it's enabled by default on Windows servers. Just change it and IE will download files without any problems. –  gronostaj Feb 6 '13 at 19:00
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Have you checked Volume Shadow copies? You can look under disk properties. Also do they have any applications hosted off of here? Could there be large amounts of files in the temp directory?

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I'm having trouble seeing anything on C: that's an obvious disk hog. I lament that I can't seem to get WinDirStat to work, even when I run as administrator. –  Blanthor Dec 8 '10 at 23:30
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