I am running a hosted windows 2003 R2 server.
This server has two partitions. A c:\ drive onto which the Windows 2003 server system and other applications are installed is sized at 20GB.
Until recently, this drive was looking very healthy. The total disk usage from windows server 2003 and the installed applications taking about 7.7GB of the available disk space.
About a week ago, the drive space usage suddenly jumped to 18GB.
Trying to get to the bottom of this, i have downloaded and used the free program windirstat. This gives a better evaluation of disk space usage by folder and file than the standard windows explorer.
Using windirstat, it still shows that the "real disk usage" on the disk is about 7.7GB. However, it is showing 10GB of "unknown files".
These "unknown files" are essentially invisible. I cannot find them and cannot delete them.
I have run chkdsk with options /f/r/x/b. This makes no difference
I have turned off Volume Shadow Copy on all drives. This also makes no difference.
Can anyone shed any light on this and/or point to any tools (hopefully open source of free trial) that I could use to get more information on the problem?