1. Managing ZFS File Systems in Oracle Solaris 11.4
  2. Creating and Destroying Oracle Solaris ZFS Storage Pools
  3. Creating ZFS Storage Pools
  4. Handling ZFS Storage Pool Creation Issues
  5. Mismatched Redundancy Levels

Mismatched Redundancy Levels

Creating pools with virtual devices of different redundancy levels results in error messages similar to the following example:

$ zpool create system1 mirror c1t0d0 c2t0d0 mirror c3t0d0 c4t0d0 c5t0d0
invalid vdev specification
use '-f' to override the following errors:
mismatched replication level: 2-way mirror and 3-way mirror vdevs are present

Similar error messages are generated if you create mirrored or RAID-Z pools using devices of different sizes.

Maintaining mismatched levels of redundancy results in unused disk space on the larger device, which is an inefficient use of ZFS. You should correct these errors instead of overriding them.