How to clone data VG & restore to other system without downtime/fast clone

Steps: 

This steps have been done on AIX 6.1. TL6
 
Map the hdiskY or lun to both the system

On system1:-

lspv

cfgmgr   ** to get new hdiskY/lun

Now Extendvg

extendvg vgname hdisky/lun
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******if you are unable to extendvg due to Max pp limitation then change the Vg properties.

chvg -t 2|3|4 (etc)  vgname
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extendvg vgname hdiskY

mirrorvg vgname hdiskY

lsvg -l vgname   * check all fs are syncd and consistent, else wait to get it consistent.

Now split the VG

splitvg -y new_vgname -c 2 -i old_vgname  
 ( -i is used so that hdiskY cant join the vg again and lv/fs remain consistent, else if you need the hdisk to rejoin the vg then dont use -i , -c 2 is to separate the second copy of lv i.e hdiskY)

varyoffvg new_vgname

exportvg new_vgname

rmdev -Rdl hdiskY
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ON System 2:

Then map same hdiskY/lun to different system if you have not done earlier

lpsv

cfgmgr

lspv

importvg -y vgname( name you like to put) hdiskY

cp -p /etc/filesystems /etc/filesystems_copy

edit /etc/filesystems  remove unwanted prefix like /fs/fs etc
mount all

check VG is doenst have any stale Lv.

Check files and application.
Remove mapping of hdisky/lun from system1.