Mirror root pool disks

First determine disk that you need to add to root pool from web interface:

In the example above it is called c1t2d0. Mirroring for now is done from the CLI only as it is a one-shot operation done by the installation person, so you have to connect using putty, ssh or use the video console to run this command:

[Config:synetostorage]$ disk mirror_rpool c1t2d0
 ### Configuring c1t0d0 to be a mirror of c1t0d0 and c1t2d0.
Preparing new disk: OK.
Mirroring partition scheme from c1t0d0 to c1t2d0: OK.
Attaching c1t2d0 to rpool: OK.
Installing boot loader to c1t2d0: OK.
Configuring boot loader: OK.
Done. Please wait for resilver to complete before rebooting.
  pool: rpool
 state: ONLINE
status: One or more devices is currently being resilvered.  The pool will
        continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
 scrub: resilver in progress for 0h0m, 1.23% done, 0h8m to go

        NAME          STATE     READ WRITE CKSUM
        rpool         ONLINE       0     0     0
          mirror-0    ONLINE       0     0     0
            c1t0d0s0  ONLINE       0     0     0
            c1t2d0s0  ONLINE       0     0     0  60.4M resilvered

errors: No known data errors
[Config:storage]$ _

The resilvering of the second root pool disk will continue in the background, so you can continue with the next steps. Before rebooting or shutting down the storage, check that it has finished resilvering by running “disk mirror_rpool status” from CLI.