Oracle Solaris systems are generally backed up by using 1/2-inch tape cartridge devices or high capacity devices. You can review Oracle's current tape product line in https://www.oracle.com/storage/index.html. Select the Tape Storage tab.
See Oracle's current tape storage documentation in https://www.oracle.com/technetwork/documentation/tape-storage-curr-187744.html.
The media that you choose depends on the availability of the equipment that supports it and of the media (usually tape) that you use to store the files. Although you must do the backup from a local system, you can write the files to a remote device.