Extend my LVM After Upgrading SSD

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http://unix.stackexchange.com – So, I have a 120 GB SSD (/dev/sdb) that I have a dual boot of Windows 7 and Fedora 17. When I first started I only have a 60 GB SSD so my space was very limited. I have a partition on my SSD (dev/sdb4) which I created with gparted, that shows a "Partition 5 LVM2" (dev/sdb5) below it which I believe is what the LVM is stored on(?). Anyways, using gparted I extened my /dev/sdb4 to 27GB, which then created a "Free Space" of 17GB within /dev/sdb4. Now I need to combine /dev/sdb5 and the free space into one. I've tried: lvextend -L+16G /dev/vg_mine/lv_root which results in: Extending logic (HowTos)