3 of 3 added 786 characters in body

how to create another physical volume/partition with existing unused lvm space without data loss?

I have a 1T USB disk with Fedora 20 installed. It shows as sdd in the first image below. I only used about 50GB. There are 3 logic volumes under the sdd2 and also there are about 620GB of free space after I shrunk its home logical partition, as shown in the second image.

I am thinking create a physical volume/partition, sdd3, by using that 620GB free space. I hope other logical volumes will not be damaged and data will stay unchanged. how can I do that?

I have created a disk image with clonezilla. So I am not worry about data loss during the process.

The purpose of doing this is I want to move the installation on my 1T disk with settings over to my another 500GB USB disk. I have tried many ways, clonezilla, dd logical partition(s), true image, gparted, .... no one can help me or gives me a good result due to the lvm and smaller destination. I hope I can dd physical partition after the new physical partition takes over some space.

sdd is the 1T USB disk

green color is the free space


My have to restart my ubuntu live CD session. now the target disk is sdb . I got error when I try to resize the sdb2:

ubuntu@ubuntu:~$ sudo su
root@ubuntu:/home/ubuntu# pvdisplay /dev/sdb2
  --- Physical volume ---
  PV Name               /dev/sdb2
  VG Name               fedora_lym
  PV Size               930.99 GiB / not usable 4.00 MiB
  Allocatable           yes 
  PE Size               4.00 MiB
  Total PE              238333
  Free PE               160569
  Allocated PE          77764
  PV UUID               Ytsy31-op7u-DqLM-lJG7-uIFb-2hAG-eZhn0a

root@ubuntu:/home/ubuntu# pvresize --setphysicalvolumesize 320G /dev/sdb2
  /dev/sdb2: cannot resize to 81919 extents as later ones are allocated.
  0 physical volume(s) resized / 1 physical volume(s) not resized


Done, sdb3 is here now:

root@ubuntu:/home/ubuntu# lsblk
sda                     8:0    0 223.6G  0 disk 
├─sda1                  8:1    0   100M  0 part 
└─sda2                  8:2    0 223.5G  0 part 
sdb                     8:16   0 931.5G  0 disk 
├─sdb1                  8:17   0   500M  0 part 
├─sdb2                  8:18   0 312.5G  0 part 
│ ├─fedora_lym-swap 252:0    0   3.8G  0 lvm  
│ ├─fedora_lym-home 252:1    0   250G  0 lvm  
│ └─fedora_lym-root 252:2    0    50G  0 lvm  
└─sdb3                  8:19   0 618.5G  0 part 
sr0                    11:0    1   4.4G  0 rom  /cdrom
loop0                   7:0    0   1.1G  1 loop /rofs