I have a Dell XPS 8700 running Windows 7 Professional 64-bit.  It came equipped with one 2TB hard drive (Seagate 7200 RPM SATA Hard Drive + Intel SRT 32GB SSD Cache).  I bought a second identical hard drive and want to create a RAID 1 (Mirroring) Volume.  I physically installed it and the system recognizes the drive.

The configuration utility (CNTL-I on bootup) shows the second hard drive, but the options to Create RAID Volume and Delete RAID Volume are greyed out.  The utility shows the original hard drive is accelerated and a 29.8GB Dev_Cache RAID 0 Volume is present.

This is the display in Control Panel/Disk Management:

When I right click in one of the Primary Partitions in Disk 0 and select "Add Mirror", the following message appears: "The operation you selected will convert the selected basic disk(s) to dynamic disk(s). If you convert the disk(s) to dynamic, you will not be able to start installed operation systems from any volume on the disk(s) (except the current boot volume). Are you sure you want to continue?"

I don't want to take this drastic step.

Is there a way for me to create a RAID 1 Volume with my two identical hard drives?