Review the following ZFS storage pool configuration requirements:
The pool that is intended to be the root pool must have an SMI label. This requirement is met if the pool is created with disk slices.
The pool must exist either on a disk slice or on disk slices that are mirrored. If you attempt to use an unsupported pool configuration during an Oracle Solaris Live Upgrade migration, you see a message similar to the following:
ERROR: ZFS pool name does not support boot environments
For a detailed description of supported ZFS root pool configurations, see Creating a ZFS Root Pool.
x86: The disk must contain a Solaris fdisk partition. A Solaris fdisk partition is created automatically when the x86 based system is installed. For more information about Solaris fdisk partitions, see Guidelines for Creating an fdisk Partition in System Administration Guide: Devices and File Systems.
Disks that are designated for booting in a ZFS root pool must be limited to 1 TB in size on both SPARC based and x86 based systems.
Compression can be enabled on the root pool but only after the root pool is installed. No way exists to enable compression on a root pool during installation. The gzip compression algorithm is not supported on root pools.
Do not rename the root pool after it is created by an initial installation or after Solaris Live Upgrade migration to a ZFS root file system. Renaming the root pool might cause an unbootable system.