I have a LUN (From HP-Storage VA7110) that is claimed on 2 servers, but is in used in one of the VG on Server-1 .
Now I want to shut Server-1 and re-use that LUN on server-2 .

Server-1
Path-1 : /dev/rdsk/c4t0d1 
Path-2: /dev/rdsk/c6t0d1

Server-2
Path-1: /dev/rdsk/c5t0d1  
Path-2: /dev/rdsk/c4t0d1

# pvcreate -f /dev/rdsk/c5t0d1
# mkdir /dev/vg05
# mknod /dev/vg05/group c 64 0x050000 
# vgcreate -l 255 -p 32 -s 8 /dev/vg05   /dev/rdsk/c5t0d1   /dev/dsk/c4t0d1
# vgdisplay -v vg05

I suggest you do a

 pvdisplay -v /dev/dsk/c4t0d1 | more

No server is not in cluster, have clean exported the VG and de-provisioned that server-1 .

Now I want to use same LUN on Server-2 as fresh to extend an existing volume group .

You will need to run on server-1 (on which you want to remove the LUN from)

1. vgdisplay -v the group, and write down the LUN's/disks that are used in it.
2. vgexport on that volume group.
3. pvremove on disks that are inside that volume group.
4. Depresent the disks from storage side.
5. Run ioscan -fnC disk , and check for NO_HW
6. Run rmsf -H on NO_HW devices

You have now removed the Lun(s) from server1.

Present the lun's to server 2, run ioscan -fnC disk .
If you are running v2, you will need to run insf -e to create devices, on v3 they will be created after ioscan.
Verify the results with xpinfo , or similar tool.
Run pvcreate on those rdsks created (you don't need -f if you ran pvremove on server1), only per one path is enough of course.
Use the LUN in new or existing volume group.

Notice, if you are running v2 and you are using multipath, you will need to add both paths in your volume group via vgextend (existing) or vgcreate (new).

Hope that helps.
Regards
Peasant.

Thanks Peasant .

Now am getting below error while importing same on cluster node .

# vgimport -p -v -s -m /tmp/vg01.map /dev/vg01
Beginning the import process on Volume Group "/dev/vg01".
Verification of unique LVM disk id on each disk in the volume group
/dev/vg01 failed.
Following are the sets of disks having identical LVM disk id
/dev/dsk/c5t0d2 /dev/dsk/c4t1d1 /dev/dsk/c5t1d1
/dev/dsk/c5t0d3 /dev/dsk/c4t1d2 /dev/dsk/c5t1d2


# vgimport -p -v -s -m /tmp/vg01.map /dev/vg01 /dev/dsk/c5t0d2 /dev/dsk/c5t0d3 /dev/dsk/c4t0d2 /dev/dsk/c4t0d3 /dev/dsk/c5t0d1 /dev/dsk/c4t0d1
Beginning the import process on Volume Group "/dev/vg01".
Verification of unique LVM disk id on each disk in the volume group
/dev/vg01 failed.
Following are the sets of disks having identical LVM disk id
/dev/dsk/c5t0d2 /dev/dsk/c4t1d1 /dev/dsk/c5t1d1
/dev/dsk/c5t0d3 /dev/dsk/c4t1d2 /dev/dsk/c5t1d2

This is because the new disks that you are adding have the same LVM id as existing ones on machine

Are you sure this is not a serviceguard cluster or some storage based cloning like truecopy or business copy ?

If you are sure those are the disks you want to use...

vgexport /dev/vg01
mkdir /dev/vg01
mknod /dev/vg01/group c 64 0x050000
vgchgid  /dev/rdsk/c5t0d2 /dev/rdsk/c5t0d3 /dev/rdsk/c4t0d2 /dev/rdsk/c4t0d3 /dev/rdsk/c5t0d1 /dev/rdsk/c4t0d1
vgimport /dev/vg01 /dev/dsk/c5t0d2 /dev/dsk/c5t0d3 /dev/dsk/c4t0d2 /dev/dsk/c4t0d3 /dev/dsk/c5t0d1 /dev/dsk/c4t0d1

Yes.. there's serviceguard cluster and each LUN (from HP Storage VA7110) having true copy and business copy ..

- Have check business copy is taken but is of 0MB size .. (AM not sure why..)

- Have added a LUN on Primary cluster server and are able to see the extended space in VG and both path ..

< ON Server-1 >

# strings /etc/lvmtab
/dev/vg00
/dev/dsk/c1t2d0
/dev/dsk/c2t2d0
/dev/vg01
/dev/dsk/c5t0d2
/dev/dsk/c5t0d3
/dev/dsk/c4t0d2
/dev/dsk/c4t0d3
/dev/dsk/c5t0d1
/dev/dsk/c4t0d1



# vgdisplay -v vg01
..
..
      --- Physical volumes ---
   PV Name                     /dev/dsk/c5t0d2
   PV Name                     /dev/dsk/c4t0d2  Alternate Link
   PV Status                   available
   Total PE                    5631
   Free PE                     0
   Autoswitch                  On

   PV Name                     /dev/dsk/c5t0d3
   PV Name                     /dev/dsk/c4t0d3  Alternate Link
   PV Status                   available
   Total PE                    5631
   Free PE                     1
   Autoswitch                  On

   PV Name                     /dev/dsk/c5t0d1
   PV Name                     /dev/dsk/c4t0d1  Alternate Link
   PV Status                   available
   Total PE                    5119
   Free PE                     1279
   Autoswitch                  On