Starting with AIX 6.1 (TL4?), you can use the alt_disk_copy command to convert rootvg
file systems from jfs to jfs2. The man page for the alt_disk_copy command
states the following: -T
Indicates that you want to convert JFS file systems to JFS2 file systems during
the process of recreating the rootvg volume group on target disks. As an example, to clone a running systems rootvg to hdisk2, and convert
the rootvg file systems from JFS to JFS2, you would run the following command: #
alt_disk_copy -T -d hdisk2 Good to know!