Identify the component (concatenation or stripe) to be used as a submirror.
It must be the same size (or larger) as the existing submirror in the mirror. If you have not yet created a volume to be a submirror, see Creating RAID 0 (Stripe) Volumes or Creating RAID 0 (Concatenation) Volumes.
Make sure that you have root privilege and that you have a current backup of all data.
Use one of the following methods to attach 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 Components tab. Follow the instructions on screen. For more information, see the online help.
Use the metattach mirror submirror command.
# metattach mirror submirror
See the metattach(1M) man page for more information.
# metastat d30 d30: mirror Submirror 0: d60 State: Okay ... # metattach d30 d70 d30: submirror d70 is attached # metastat d30 d30: mirror Submirror 0: d60 State: Okay Submirror 1: d70 State: Resyncing Resync in progress: 41 % done Pass: 1 Read option: roundrobin (default) Write option: parallel (default) Size: 2006130 blocks ...
This example shows the attaching of a submirror, d70, to a one-way mirror, d30, creating a two-way mirror. The mirror d30 initially consists of submirror d60. The submirror d70 is a RAID 0 volume. You verify that the status of the mirror is “Okay” with the metastat command, then attach the submirror. When the metattach command is run, the new submirror is resynchronized with the existing mirror. When you attach an additional submirror to the mirror, the system displays a message. To verify that the mirror is resynchronizing, use the metastat command.