Oracle Solaris ZFS Administration Guide

Creating a Mirrored Storage Pool

To create a mirrored pool, use the mirror keyword, followed by any number of storage devices that will comprise the mirror. Multiple mirrors can be specified by repeating the mirror keyword on the command line. The following command creates a pool with two, two-way mirrors:

# zpool create tank mirror c1d0 c2d0 mirror c3d0 c4d0

The second mirror keyword indicates that a new top-level virtual device is being specified. Data is dynamically striped across both mirrors, with data being redundant between each disk appropriately.

For more information about recommended mirrored configurations, see the following site:

Currently, the following operations are supported in a ZFS mirrored configuration:

You cannot outright remove a device that is not a log or a cache device from a mirrored storage pool. An RFE is filed for this feature.