In a Linux environment, with enough privileges to read device-mapper data (e.g. where the LVM command "lvs" works):
In utop, load the package:
#require "devmapper";;Query the list of known device-mapper targets:
Devmapper.ls();;
- : bytes list =
["packer--virtualbox--iso--vg-root"; "packer--virtualbox--iso--vg-swap_1"]Query the specific details of one of the targets:
Devmapper.stat "packer--virtualbox--iso--vg-swap_1";;
- : Devmapper.info option =
Some {Devmapper.suspended = false; live_table = 1; inactive_table = 0;
open_count = 2l; event_nr = 0l; major = 252l; minor = 1l; read_only = false;
target_count = 1l; deferred_remove = 0;
targets =
[{Devmapper.Target.start = 0L; size = 1048576L;
kind =
Devmapper.Target.Linear
{Devmapper.Location.device = Devmapper.Location.Number (8l, 5l);
offset = 132663296L}}]}