AIX how to mirror rootvg

Using the mirrorvg command to mirror rootvg volume group
# lsvg -p rootvg
rootvg:
PV_NAME PV STATE TOTAL PPs FREE PPs FREE DISTRIBUTION
hdisk0 active 546 526
109..105..94..109..109
# extendvg rootvg hdisk1
0516-1254 extendvg: Changing the PVID in the ODM.
# mirrorvg rootvg
0516-1124 mirrorvg: Quorum requirement turned off, reboot system for this
to take effect for rootvg.
0516-1126 mirrorvg: rootvg successfully mirrored, user should perform
bosboot of system to initialize boot records. Then, user must modify
bootlist to include: hdisk0 hdisk1.
# bosboot -ad /dev/hdisk1
bosboot: Boot image is 23795 512 byte blocks.
# bootlist -m normal hdisk0 hdisk1
# lsvg -l rootvg
rootvg:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
hd5 boot 1 2 2 closed/syncd N/A
hd6 paging 4 8 2 open/syncd N/A
hd8 jfs2log 1 2 2 open/syncd N/A
hd4 jfs2 1 2 2 open/syncd /
hd2 jfs2 9 18 2 open/syncd /usr
hd9var jfs2 1 2 2 open/syncd /var
hd3 jfs2 1 2 2 open/syncd /tmp
hd1 jfs2 1 2 2 open/syncd /home
254 IBM Eserver p5 and pSeries Administration and Support for AIX 5L V5.3
hd10opt jfs2 1 2 2 open/syncd /opt
#shutdown -Fr