Typically, each boot environment requires a minimum of 350 to 800 Mbytes of disk space, depending on your system software configuration. Utilities that are used by the Solaris Live Upgrade user interface determine your resource requirements.
To estimate the file system size that is needed to create a boot environment, start the creation of a new boot environment. The size is calculated and you can then abort the process.
You can create a boot environment only on a disk that can serve as a boot device. Some systems restrict which disks can serve as a boot device. Refer to your system's documentation to determine if any boot restrictions apply.