Example -- Creating a Two-Way Mirror

# metainit d51 1 1 c0t0d0s2
d51: Concat/Stripe is setup
# metainit d52 1 1 c1t0d0s2
d52: Concat/Stripe is setup
# metainit d50 -m d51
d50: Mirror is setup
# metattach d50 d52
d50: Submirror d52 is attached

This example creates a two-way mirror, d50. The metainit(1M) command creates two submirrors (d51 and d52), which are actually concatenations. The metainit -m command creates the one-way mirror from the d51 concatenation. The metattach(1M) command attaches d52, creating a two-way mirror and causing a mirror resync. (Any data on the attached submirror is overwritten by the other submirror during the resync.) The system verifies that the objects are set up.