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Implementing RAID1 on Windows Server 2003

Setting up a RAID1 (software) array on Windows Server is a straight forward task. RAID1 or disk mirroring provides fault tolerance in the event of a single disk failure, the mirror would become the lifeline keeping the server functional.

RAID is not backup, you still need to perform backups to an external device or separate drive.

For this tutorial I will be using two identical size hard drives in which drive 1 will mirror drive 0.


Go to:

Start > Administrative Tools > Computer Management.

On the Computer Management window click on Storage > Disk Management. You can see we have two disks 0 and 1. On disk 0 right click on the grey area and select Convert to Dynamic Disk…

I recommend you convert to both disks to dynamic Disk 0 and Disk 1 since you have to do it anyway and select OK.

You are presented with a list of the drives that will be converted to dynamic. Select Convert.

Click on Yes to convert.

Click on Yes to dismount all file systems.

Click on OK to restart the system.

Windows will reboot and once again prompt you to restart the system once it finishes installing new devices. Click on Yes to restart.

And now we RAID

Now, we are ready to RAID the two drives. Go back to Start > Administrative Tools > Computer Management > Storage > Disk Management.

Right click on Disk 0 aka the C drive box and select Add Mirror…

Click on Add Mirror, don’t forget to select Disk 1.

Wait for the drives to Resync.

Once the drives are done resynching you will have a mirrored system.

From now on the system will see the array as a single drive.

Congratulations, you have added another layer of protection to your system.

Latest Edit: 8/18/2010


  1. Commented on
    Comment by Roger99

    Best article on the subject I have seen so far. Thanks!

  2. Commented on
    Comment by Manoj

    Thank you for such information…

  3. Commented on
    Comment by saroj

    Thanks & regds

  4. Commented on
    Comment by mickeway

    I have two new similar HDD. I have installed Windows Server 2003 on one HDD and I wonder whether I should format and install Windows Server 2003 on the other one too before I do the RAID1? Or should I only format it or should I neither format nor install Windows Server 2003 on it?

    Thanks for a very coherent and concise explanation otherwise,


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