There are 3 versions of the dbrepair tool. If you are running a version earlier than version 126.96.36.1993, use the original dbrepair.zip.
If you are running a version of the MTA between 188.8.131.523 and 2 then you must use dbrepair2.zip.
If you are running MTA version 2.0 and higher, use dbrepair3.zip.
The dbrepair tool must be run from the command line in the Hurricane Server bin directory. Download the appropriate .zip file from this article and unzip dbrepair.exe and its supporting files into the bin directory.
dbrepair [-r] [-R] [-v]
r - Quick repair (marks bad items as inaccessible only, no output if no errors found)
R - Full repair, performs backup and in-place restore
v - Validate only (no output if no errors found)
All Hurricane Server services must be stopped prior to running dbrepair. You must also run this tool as an administrator with elevated privileges.