---
title: Verifying or Repairing the Hurricane Server Database
description: There are 4 versions of the dbrepair tool. Please select the repair tool appropriate for your current version of the MTA. If you are running MTA version 4.0 or higher, use dbrepair4.zip. View Embed: h
---
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# Verifying or Repairing the Hurricane Server Database
The Hurricane Server dbrepair tool can be run to verify and repair Hurricane Server's database file: master.fdb. This database contains the DNS cache, statistical information used for reports and your list of accounts. You should backup your master.fdb file prior to running dbrepair. master.fdb is in the Hurricane Serverdata directory.
**DBRepair Tool Versions**
There are 4 versions of the dbrepair tool. Please select the repair tool appropriate for your current version of the MTA.
If you are running MTA version 4.0 or higher, use dbrepair4.zip.
**View Embed: [https://download.socketlabs.com/hms/dbrepair/dbrepair4.zip](https://download.socketlabs.com/hms/dbrepair/dbrepair4.zip)**
If you are running MTA version 2.0 and 3.0, use dbrepair3.zip.
**View Embed: [https://download.socketlabs.com/hms/dbrepair/dbrepair3.zip](https://download.socketlabs.com/hms/dbrepair/dbrepair3.zip)**
If you are running a version of the MTA between 1.0.0.843 and 2 then you must use dbrepair2.zip.
**View Embed: [https://download.socketlabs.com/hms/dbrepair/dbrepair2.zip](https://download.socketlabs.com/hms/dbrepair/dbrepair2.zip)**
For versions earlier than version 1.0.0.843, you will use the original dbrepair.zip.
**View Embed: [https://download.socketlabs.com/hms/dbrepair/dbrepair.zip](https://download.socketlabs.com/hms/dbrepair/dbrepair.zip)**
**DBRepair Tool Instructions**
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 restorev - 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.
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