Add Mirror option disabled?

I'm having trouble adding a mirrored drive in the following instance.  The server is a Dell SC440 running SBS 2003 R2.  Both drives are identical 250 GB drives.  The below information is how Disk Management sees it.

  Disk0 - Set as Dynamic, Size (232.81 GB) Contains C: (OS, 25GB) D: (DATA, 207.67GB), Dell Utility Partition (141 MB)
  Disk1 - Set as Dynamic, Unallocated, Size (232.83 GB)

Select "New Volume" on Disk1 and only option is Simple.

What am I doing wrong here?  Is Disk1 not being seen a a large enough drive to mirror Disk0?
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r-kConnect With a Mentor Commented:
Are you doing this correctly? The way to add a mirror is to right-click on disk0 and select "Add Mirror", then it should ask which drive you want to use for the mirror, and so on.
compuag2Author Commented:
I rebooted the server and the mirror option became avaliable.  Once it became avaliable, r-k's suggestion was correct.

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