The install_type keyword can be used for either a UFS file system or a ZFS root pool installation. The usage is limited for a ZFS installation. You can only use the intial_install option for a ZFS installation.
If you want to migrate your UFS file system to a ZFS root pool or upgrade a ZFS root pool, you must use Solaris Live Upgrade. See Chapter 11, Solaris Live Upgrade and ZFS (Overview), in Solaris 10 5/09 Installation Guide: Solaris Live Upgrade and Upgrade Planning.
For a complete list of keywords that can be used in a UFS or ZFS installation, see Table 8–2
For a description of how the install_type keyword can be used when installing a ZFS root pool, see JumpStart Keywords for a ZFS Root (/) File System (Reference).
install_type defines whether to erase and install a new Solaris OS on a system, upgrade the existing Solaris OS on a system, or install a Solaris Flash archive on the system.
You must specify install_type in a profile, and install_type must be the first profile keyword in every profile.
Specifies to perform an initial installation of the Solaris OS
Specifies to perform an upgrade of the Solaris OS
Specifies to install a Solaris Flash archive that overwrites all files
Specifies to install a Solaris Flash differential archive that overwrites only the files that are specified
Some profile keywords can only be used with the initial_install option. Some profile keywords can only be used with the upgrade option. Some profile keywords can only be used with the flash_install option.