Make sure that you have root privilege and that you have a current backup of all data.
Use one of the following methods to detach 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 Submirrors tab. Follow the instructions on screen. For more information, see the online help.
Use the metadetach command to detach a submirror from a mirror.
# metadetach mirror submirror
See the metadetach(1M) man page for more information.
# metastat d5: mirror Submirror 0: d50 ... # metadetach d5 d50 d5: submirror d50 is detached
In this example, mirror d5 has a submirror, d50, which is detached with the metadetach command. The underlying slices from d50 are going to be reused elsewhere. When you detach a submirror from a mirror, the system displays a confirmation message.