We have and exchange server running windows 2003 enterprise server with exchange 2003 standard. We have been getting errors in our event log (the file system structure on the disk is corruot and unusable. Please run the chkdsk utility in the volume DataPart2). I plan on running the utility on out data volume. Everything expect the windows install files are on this partition. Our PRIV files are located on this partition. My question is, Do I need to dismount the store before running the chkdsk utility? Besides backing up , is there anything else I will need to do before running this?