After i finish my work in Database Mirroring with operation Mode (high Safty ). i explorer it will not be Automatic failover becouse this option if you need it you must configure your mirroring with operation mode (High Availability Synchonous) and this Operation Mode need 3 Servers (Principle , Mirroring , Witness) So i will Show now how to add or Replace mirroring Database Witness Server

1- Now this my mirroing operation mode it’s high safty without automatic and the witness Server not Configure

Mirroring operation mode

2- Click on Configure Secuirty after this mirroring will Ask you if you nedd to Configure Witness Server or not Select yes

Configure Witness

3- Check Witness Server

Check Witness Server

4- mirroring will return the principle server configuration

principle Configuration

5- Select Witness Server

Select Witness Server

6- Configure Witness Server and the port listner

Configure Witness

7- Put Services Account in my experince if you working in Workgroup and your all instance in the same windows like thie example create new user Administrator on your pc and add him in SQl Server login the use it ElSE if you use Workgroup but the SQl Servers not all in the Same pc you will use 3 Windows or 2 create Certification in your SQL Server and i will show it in the next post who to create Mirroroing With Login Certification .

Account Services

8- After this Step Click finish No your database witness is Configured

Witness is Configuerd

Now your Configuration is Complete and if you comapre between image no 8 and image no 1 you will see the difference you will see now we have Mirroring With operation mode high safty With Automatic failover


in Step no 6 you will See i write the port no is 5023 but when i finish my Steps and arraive to step no 8 then click on ok i reicive this Error :

TITLE: Microsoft SQL Server Management Studio ——————————

Alter failed for Database ‘ACC2012’.  (Microsoft.SqlServer.Smo)

For help, click:


An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)


The ALTER DATABASE command could not be sent to the remote server instance ‘TCP://IT-PC:5023’. The database mirroring configuration was not changed. Verify that the server is connected, and try again. (Microsoft SQL Server, Error: 1456)

For help, click:

—————————— BUTTONS:

OK ——————————

i don’t know what is error i search more and more on the internet but i don’t found good Soluation but when i checked the SQL Server log i see somthing say { SQL Server can not listen to the port No 5023 }

So i Recounfigured the mirroring again and Change the port for the Witness Server form 5023 to 5024 it’s Working now very good so before any thing or before you go to internet Please try to check :

SQL Server log

Windows Event Wiewr

This very good help to know what’s the really problem


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