问题:
A . reboot the server in maintenance mode;migratevg -y newvg oldvg;reboot the server in normal mode
B . unmount all filesystems in the volume group;varyoffvg oldvg;migratepv -y oldvg -n newvg varyonvg newvg
C . unmount all filesystems in the volume group;varyoffvg oldvg;exportvg oldvg;importvg -y newvg hdisk1;mount all
D . unmount all filesystems in the volume group;varyoffvg oldvg;for each logical volume in the volume group do cplv -v oldvg -y newvg;varyonvg newvg;mount all
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