metastat d101
d101: Mirror
    Submirror 0: d111
      State: Needs maintenance 
    Submirror 1: d121
      State: Needs maintenance 
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 35340000 blocks

d111: Submirror of d101
    State: Needs maintenance 
    Invoke: metasync d101
    Size: 35340000 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c3t1d0s0                   0     No    Resyncing    


d121: Submirror of d101
    State: Needs maintenance 
    Invoke: after replacing "Maintenance" components:
                metareplace d101 c3t9d0s0 <new device>
    Size: 35340000 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c3t9d0s0                   0     No    Last Erred