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Using the OMSA tool in Windows Server 2008 R2 I have created a new RAID 5 array and virtual disk called Vault. This is how it appears in OMSA;

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I am using 6 physical disks in the RAID.

After creating the virtual disk it appeared in the disk management area as two unallocated disk partitions;

  • 1 x 2048GB
  • 1 x 2607GB

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However I want one large 4655GB volume, not two individual ones.

When in the disl management area for the first time I was prompted to 'initialise disk', I choose the default option which was MBR, although there was also GPT (similar to image below) - not sure if this makes any difference?

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So, I right clicked on the first partition and selected New Sample Volume. From here I assigned a drive letter (V). I then thought I could extend the V drive with the 2607GB of unallocated space to the right, however that option is greyed out.

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Have I configured something incorrectly? What do I need to do in order to setup the new virtual drive as one large 4655GB drive?

Any advice is appreciated.

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The disk has to be GPT formatted to support volumes larger than 2 TB.

If you haven't put anything on the volume yet, delete it. Then right click on Disk 3 and pick "Convert to GPT", or Initialize and then pick GPT. You can then create your volume.

If you do have data on it, you can right-click Disk 3 and pick "Convert to GPT". Then you can expand the volume.

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