Microsoft KB Archive/102665

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PC Win: Err Msg: There Was an Unknown Disk Error

Article ID: 102665

Article Last Modified on 10/30/2006


  • Microsoft Mail Client 3.0
  • Microsoft Mail Client 3.0
  • Microsoft Mail Client 3.2

This article was previously published under Q102665


When you save a message to a file, Microsoft Mail for Windows does not determine if there is enough disk space before it starts writing the file. If the file already exists, Mail overwrites it. If there is not enough disk space, Mail truncates the file and displays this alert:

There was an unknown disk error. Some data was written disk.

NOTE: This message should say "written to disk."


Microsoft has confirmed this to be a problem in versions 3.0, 3.0b, and 3.2 of Microsoft Mail for Windows. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: 3.00 3.00b 3.20

Keywords: KB102665