Calculating 3d polygons' surface area using ArcGIS Desktop?

Volume group name should be unique on system, by design. Problem occurs when a disk is moved from one system to another.

So you have few options (detailed below)

• Rename the VG externally [not mounted] disk(s).
• Rename the VG of your system (not realistic)
• Merge both volume group into a single one (probably needs to rename first)

Option 1 - Rename the VG externally on the unmounted disk(s)

Use the command vgrename. You need to use vgdisplay or vgs,to retrieve the volume group UUID.

$ vgs -o vg_name,vg_attr,vg_uuid
VG           Attr   VG UUID                               
vg_andromeda wz--n- gc5zhX-vrW9-mEDA-mzNN-kZxf-9nON-1aWwGY
????         ?????? bwQkRq-mgph-9BYf-9WPF-cKz0-FLFq-0Qxs73

$ vgrename bwQkRq-mgph-9BYf-9WPF-cKz0-FLFq-0Qxs73 vg_andromeda_old
$ vgchange -ay vg_andromeda_old

(please, edit/update this post with the actual ouput of the command vgs)

Option 2 - Rename the VG of your system

This is not realistic. You can't rename an active volume group, so you would have to boot on a CD/DVD, rename the VG, and fix your system configuration in various places (fstab, bootloader)...

However, since your installation is fresh, you could reinstall your system with another name.

Option 3 - Merge both volume group into a single one

You could merge both VGs, but it has a few caveats;

1. It only makes sense if both drives are meant to remain on the system.
2. You can't have two LVs with the same name in a single VG.
3. You have an SSD and an HDD, It's recommended to keep them on distinct VG for clarity.
4. The vgmerge command seems to only merge two VGs by Name (not UUID), so you have to rename the duplicate VG anyway.