Replace FC drive in different size on a DS2405

[ISHS WC]

Can anyone tell me the best and details procedure to perform the following task?
I have 2xHP-UX on rp3440 connects to a DS2450 by FC which all slots are used. Now, I need to extend a mirrored VG in a cluster package with 2x36G disks to 2x146G disks, since the DS2450 is full, I can only replace the 2x36G with 2x146G disks. How can I duplicate the VG to the new 2x146G disks and keep the original 36G VG for fallback at any time and minimize the needs to modify the cluster configuration.
What I know is to:
1. note the layout of the vg (ioscan, vgdisplay and lvdisplay).
2. stop the cluster package.
2. activate and mount the vg and filesystem.
3. backup data on the vg by tar or fbackup.
4. backup the vg config by vgcfgbackup.
5. umount the filesystems.
6. vgexport the vg.
7. replace the physical disks.
8. update fc card status by fcmsutil.
9. ioscan for new disks.
10. create new vg with the same name.
11. create all lvol.
12. mount filesystems.
13. restore data from the backup.
14. umount and deactivate filesystems and vg.
15. start the cluster package.

Thanks!!

[Luk Vandenbussche]

Your procedure seems ok to me.

I would take a least 2 backups to be 100 % sure.