Steps to mirror the root VG :
# lspv : determine the hdisk#
# extendvg rootvg hdisk<number> : To add the hdisk to the volume group
# lspv : verify that the hdisk has been successfully added to the volume group
# chvg -Q 'n' rootvg : To change the quorum so that the vg will stay active if one of the mirrors fail
# mirrorvg -S -c 2 rootvg : mirror all of the logical volumes in the volume group
# lsvg -l rootvg : verify successful mirroring (pps will appear "stale" until synchronization is complete).
# bosboot -a -d "disk" : update the boot image information
# bootlist -m normal -o hdisk0 hdisk1 : create a new bootlist
# bootlist -m normal -o : verify the bootlist is correct
# lspv : determine the hdisk#
# extendvg rootvg hdisk<number> : To add the hdisk to the volume group
# lspv : verify that the hdisk has been successfully added to the volume group
# chvg -Q 'n' rootvg : To change the quorum so that the vg will stay active if one of the mirrors fail
# mirrorvg -S -c 2 rootvg : mirror all of the logical volumes in the volume group
# lsvg -l rootvg : verify successful mirroring (pps will appear "stale" until synchronization is complete).
# bosboot -a -d "disk" : update the boot image information
# bootlist -m normal -o hdisk0 hdisk1 : create a new bootlist
# bootlist -m normal -o : verify the bootlist is correct
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