Make sure that you have root privilege and that you have a current backup of all data.
Use the metastat command to view the status of the RAID-1 volume and associated submirrors.
# metastat mirror-name
Use one of the following methods to replace a submirror.
From the Enhanced Storage tool within the Solaris Management Console, open the Volumes node. Choose the mirror. Then, choose Action⇒Properties and click the Submirror tab. Follow the onscreen instructions. For more information, see the online help.
Use the metadetach, metaclear, metatinit, and metattach commands to replace an entire submirror.
Use the metadetach command to the failed submirror from the mirror.
# metadetach -f mirror-name submirror
Forces the detach to occur
Specifies the name of the mirror
Specifies the submirror to detach
Use the metaclear command to delete the submirror.
# metaclear -f submirror
Forces the deletion of the submirror to occur
Specifies the submirror to delete
Use the metainit command to create a new submirror.
# metainit volume-name number-of-stripes components-per-stripe component-name
Specifies the name of the volume to create. For information on naming volumes, see Volume Names.
Specifies the number of stripes to create.
Specifies the number of components each stripe should have.
Specifies the names of the components that are used. This example uses the root slice, c0t0d0s0.
Use the metattach command to attach the new submirror.
# metattach mirror submirror
The following example illustrates how to replace a submirror in an active mirror.
# 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 -f 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
In this example, 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 needs to be cleared and recreated. The metadetach command detaches the failed submirror from the mirror by using the -f option, which forces the detachment to occur. The metaclear command clears the submirror. The metainit command recreates submirror, d22, with new slices. Finally, the metattach command attaches the rebuilt submirror. A mirror resynchronization begins automatically.
The specific configuration of the new volume, d22, depends on the component you are replacing. A concatenation, as shown here, can sufficiently replace a concatenation. However, a concatenation would not be an ideal replacement for a stripe because it could impact performance.