Moving a volume group to another physical disk

[RodinM]

I'm trying to move a volume group to another physical storage issuing a command:
pvmove /dev/cciss/c0d8
and get an answer:
Physical Volume "/dev/cciss/c0d8" not found in Volume Group "VGONVD4"
But I am sure I created a physical volume using this device name like this:
pvcreate /dev/cciss/c0d8
And strange things: when I issue a command "pvscan" it shows me the following:
PV /dev/block/104:178 VG pve lvm2 [8.80 GB / 1.11 GB free]
PV /dev/block/104:480 VG VGONVD4 lvm2 [5.46 TB / 5.28 TB free]
PV /dev/block/104:97 VG VGONVD4 lvm2 [1.59 TB / 1.59 TB free]
not the disk labels (/dev/cciss/c0d8 and /dev/cciss/c0d6) I used by "pvcreate" command
I need to free up a disk with 5.46TB storage but what do these labels mean: /dev/block/104:* ?
When I'm trying to issue the "pvmove" command using the name "PV /dev/block/104:480" I see the same result:
Physical volume /dev/block/104 not found
Run `pvmove --help' for more information.
How should I treat these names of my disks and how should I move my VG to another (faster) disk (not using a long backup and restore procedure but online migration to another storage)?
Thanks in advance.

 

[FAN]

#vgchange -an VG
#pvcreate /dev/...
#vgextend VG /dev/...
#pvscan
#umount /...
#lvextend -l+100%FREE /dev/...
#resize2fs /dev/...
#vgchange -ay VG

 

[RodinM]

No, no, no!
I think it is not a way to move the storage online!
I expect something with commands "pvmove" and "vgreduce"
The question was: which disk name should I use in these commands. I expected to use "pvmove /dev/cciss/c0d8", but now it must be something different.