# metastat d20 d20: Mirror Submirror 0: d21 State: Okay Submirror 1: d22 State: Needs maintenance ... # metadetach -f d20 d22 d20: submirror d22 is detached # metaclear d22 d22: Concat/Stripe is cleared # metainit d22 2 1 c1t0d0s2 1 c1t0d1s2 d22: Concat/Stripe is setup # metattach d20 d22 d20: components are attached |
The metastat command confirms that the two-way mirror d20 has a submirror, d22, in the "Needs maintenance" state. In this case, the entire submirror will be cleared and recreated. The metadetach command detaches the errored submirror from the mirror using the -f option (this forces the detach to occur). The metaclear command clears the submirror. The metainit command recreates submirror d22, with new slices. The metattach command attaches the rebuilt submirror, and a mirror resync begins automatically.
You temporarily lose the capability for data redundancy while the mirror is a one-way mirror.