Looking at the front-end system after Torsten's runs all completed, I see:
# lvscan
ACTIVE '/dev/vg-d5oqkQ../lv-I5BT_w..' [1.00 GB] inherit
ACTIVE '/dev/vg-A2mbYQ../lv-StzyLw..' [1.00 GB] inherit
ACTIVE '/dev/vg-X0ViPw../lv-ccnoew..' [1.00 GB] inherit
ACTIVE '/dev/vg-qvqsYg../lv-i8T4vQ..' [1.00 GB] inherit
ACTIVE '/dev/vg-Kg0fNg../lv-erhiXw..' [1.00 GB] inherit
ACTIVE '/dev/vg-XbIp7g../lv-tkn_Aw..' [1.00 GB] inherit
# vgscan
Reading all physical volumes. This may take a while...
Found volume group "vg-d5oqkQ.." using metadata type lvm2
Found volume group "vg-A2mbYQ.." using metadata type lvm2
Found volume group "vg-X0ViPw.." using metadata type lvm2
Found volume group "vg-qvqsYg.." using metadata type lvm2
Found volume group "vg-Kg0fNg.." using metadata type lvm2
Found volume group "vg-XbIp7g.." using metadata type lvm2
Found volume group "vg-PXBR2A.." using metadata type lvm2
So six LVs weren't deleted properly, and seven VGs.
Looking at the front-end system after Torsten's runs all completed, I see:
# lvscan d5oqkQ. ./lv-I5BT_ w..' [1.00 GB] inherit A2mbYQ. ./lv-StzyLw. .' [1.00 GB] inherit X0ViPw. ./lv-ccnoew. .' [1.00 GB] inherit qvqsYg. ./lv-i8T4vQ. .' [1.00 GB] inherit Kg0fNg. ./lv-erhiXw. .' [1.00 GB] inherit XbIp7g. ./lv-tkn_ Aw..' [1.00 GB] inherit
ACTIVE '/dev/vg-
ACTIVE '/dev/vg-
ACTIVE '/dev/vg-
ACTIVE '/dev/vg-
ACTIVE '/dev/vg-
ACTIVE '/dev/vg-
# vgscan
Reading all physical volumes. This may take a while...
Found volume group "vg-d5oqkQ.." using metadata type lvm2
Found volume group "vg-A2mbYQ.." using metadata type lvm2
Found volume group "vg-X0ViPw.." using metadata type lvm2
Found volume group "vg-qvqsYg.." using metadata type lvm2
Found volume group "vg-Kg0fNg.." using metadata type lvm2
Found volume group "vg-XbIp7g.." using metadata type lvm2
Found volume group "vg-PXBR2A.." using metadata type lvm2
So six LVs weren't deleted properly, and seven VGs.