# vgs -a
VG #PV #LV #SN Attr VSize VFree
cinder 1 0 0 wz--n- 30.39g 30.39g
os 1 2 0 wz--n- 19.00g 4.00m
# pvs -S vg_name=os
PV VG Fmt Attr PSize PFree
/dev/sda4 os lvm2 a-- 19.00g 4.00m
# lvs -S vg_name=os
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root os -wi-ao---- 15.00g
swap os -wi-ao---- 4.00g