9. Alternate disk installationthe bos.alt_disk_install.rte fileset must be installed to clone rootvg.The process works by either cloning the existing operating system (OS) to a secondary hard disk or installing a new OS to a secondary hard disk;In the case of cloning the existing OS, this is usually done for a migration installation on the second hard disk;In the case of installing a new OS to the second hard disk, this can be accomplished from installation media, mksysb, or a NIM image.