Before you begin, review the Section 14.2.2, Guidelines for Software RAID 1 Devices.
In NSSMU, select Partitions from the NSSMU main menu.
From the list of existing partitions, select the NSS partition for the pool you want to mirror.
Press F3 to create the RAID 1 device and mirror the partition where the pool resides.
From the available devices, select up to three additional devices that you want to use as a segment, then press Enter.
On the page where you select the second partition, you have to press the space bar to select the partition for the second mirror. When it is truly selected, the asterisk next to it stays there even if you move up and down in the list. Then press F3 to mirror. The message pops up to confirm creating the mirror.
The space assigned is the same size as the existing partition. The segments must reside on different devices. If no partitions appear, it is an indication that either there are no partitions large enough or no free space exists on other devices.
To confirm the RAID 1 device, select RAID Devices from the NSSMU Main menu. The RAID 1 device ID appears in the RAID Devices window.
Select the RAID device, then view its details to make sure that synchronization has begun.
The remirroring status shows a percentage is greater than 0. It is fully synchronized at 100%.