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Virtual Machine with Windows Server 2012 (and SharePoint 2013 installed).

Within VM:
Disk C -> Properties -> Used Space 130GB.
Start Windows Backup -> Progress -> "Local disk (C:) data transferred xGB of 255GB"

Resulting backup is close to 300GB in size.

Tried restoring from it - same result. 130 taken. Next backup takes 300.

Any idea what are those other 150+ GB?

Pavel Yurasov
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  • Could you detail how you configured Windows Backup? It sounds like you might have incremental/differential backups happening, where instead of just a snapshot in time of your drive, you're getting different versions of the same file that was changed since last backup. This would account for the discrepancy. – Mikey T.K. Aug 13 '14 at 18:32
  • You know Windows Backup. Not much to configure. Just Full Server Backup. Dedicated disk (last time tried - emptied it in advance). Performance settings: "Normal backup performance". Full backup (not Copy backup). I think that's all that can be configured. – Pavel Yurasov Aug 13 '14 at 18:41
  • Do check for file system issues on the source file system by running `chkdsk`. Also, do you happen to have data de-duplication enabled or a significant amount of NTFS-compressed data? – the-wabbit Aug 13 '14 at 20:15
  • chkdsk: "Windows has scanned the file system and found no problems. No further action is required." – Pavel Yurasov Aug 14 '14 at 05:36
  • Compressed are SharePoint logs, and they are huge in size but very small on disk. Seems to be the reason - I'll give it a try. – Pavel Yurasov Aug 14 '14 at 05:45

1 Answers1

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Removing NTFS compressed logs fixed the problem.

Michael Hampton
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Pavel Yurasov
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