dmstats -V (return code: 1)
/dev/mapper/control: open failed: Permission denied
Failure to communicate with kernel device-mapper driver.
Incompatible libdevmapper 1.02.136 (2016-11-05) and kernel driver (unknown version).
Command failed
Library version: 1.02.136 (2016-11-05)
dmstats --help (return code: 1)
Usage:
dmstats
[-h|--help]
[-v|--verbose [-v|--verbose ...]]
[--areas <nr_areas>] [--areasize <size>]
[--userdata <data>] [--clear]
[--count <count>] [--interval <seconds>]
[-o <fields>] [-O|--sort <sort_fields>]
[--programid <id>]
[--start <start>] [--length <length>]
[--segments] [--units <units>]
help
clear --regionid <id> [<device>]
create [--start <start> [--length <len>]]
[--areas <nr_areas>] [--areasize <size>]
[--programid <id>] [--userdata <data> ] [<device>]
delete --regionid <id> <device>
group [--alias NAME] --regions <regions>
list [--programid <id>] [<device>]
print [--clear] [--programid <id>] [--regionid <id>] [<device>]
report [--interval <seconds>] [--count <cnt>]
[--units <u>][--programid <id>] [--regionid <id>] [<device>]
ungroup --groupid <id> [device]
version
<device> may be device name or -u <uuid> or -j <major> -m <minor>
<fields> are comma-separated. Use 'help -c' for list.