$ sudo lvs vg-cache -o+devices
  LV     VG       Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert Devices
  fast   vg-cache -wi-a-----  10.00g                                                     /dev/nvme0n1(0)
  slow   vg-cache -wi-a-----   5.93t                                                     /dev/sdb(0)