Windows Server 2019 – How to Resolve Full Disk Space Issue

disk-space-utilizationwindowswindows-server-2019

On a Windows 2019 Server the drive D: is 100% full (500 Gb used):

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I'm trying to understand why the disk is full but I can't because both File Explorer and Total Commander reports no more than 33 Gb used:

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It's also strange that WinDirStat reports 100% (500 Gb) used in the start summary, but only 33 Gb used after the analysis:

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Please note that:

  • I'm logged in as Administrator
  • I started WinDirStat with Administrator privileges
  • I tried with both local Administrator and Active Directory Domain Admin
  • I enabled hidden and system files in File Explorer and Total Commander
  • I ran chkdsk on the D: drive without finding any issue

I found 33 Gb of data. Where are other 467 Gb?

Best Answer

You could try WizTree (wiztreefree.com), which is similar to WinDirStat but it bypasses the filesystem driver and reads the MFT directly if run as an administrator. It will show space taken by alternate data streams, metadata files ($MFT, $Secure, $BadClus, etc.), and directories you don't have access to. It doesn't appear to show space allocated for directory indexes, and it may miss some other things, but I wouldn't be surprised if the culprit does show up.

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