raid10, is this a realistic install?

[Sean Bruno]

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https://lists.freebsd.org/pipermail/freebsd-geom/2012-January/005139.html

This led me to create the following:

# gmirror status
          Name    Status  Components
mirror/mirror0  COMPLETE  ada0s4 (ACTIVE)
                          ada1s4 (ACTIVE)
mirror/mirror1  COMPLETE  ada2s4 (ACTIVE)
                          ada3s4 (ACTIVE)
  mirror/swap0  COMPLETE  ada0s3 (ACTIVE)
                          ada1s3 (ACTIVE)
  mirror/swap1  COMPLETE  ada2s3 (ACTIVE)
                          ada3s3 (ACTIVE)
# geom stripe status
          Name  Status  Components
stripe/stripe0      UP  mirror/mirror0
                        mirror/mirror1
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