I have a personal remote server running Ubuntu Desktop 14.04 with no graphical access. I have LVM set up with the internal hard drive (/dev/sda), and I've plugged in a new USB hard drive (/dev/sdb). I want to add sdb to the VG and LV that I already have so I can use them as one volume. How can I do that? I see lots of guides talking about how to create VGs and LVs, but I don't want to create another, I want to add a PV to an existing VG and LV.
root@hostname:/# pvdisplay
--- Physical volume ---
PV Name /dev/sda1
VG Name discus
PV Size 149.05 GiB / not usable 2.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 38156
Free PE 0
Allocated PE 38156
PV UUID lAPqYK-iKju-w7Rz-aMw1-7kee-XGpV-2yin93
"/dev/sdb1" is a new physical volume of "111.79 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb1
VG Name
PV Size 111.79 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 3bCUBE-9rXt-AAj8-gxGn-jhDD-PtmU-DlPQeA