Provided by: dmsetup_1.02.185-3ubuntu3.2_amd64 
NAME
blkdeactivate — utility to deactivate block devices
SYNOPSIS
blkdeactivate [-d dm_options] [-e] [-h] [-l lvm_options] [-m mpath_options] [-r mdraid_options] [-o
vdo_options] [-u] [-v] [device]
DESCRIPTION
The blkdeactivate utility deactivates block devices. For mounted block devices, it attempts to unmount it
automatically before trying to deactivate. The utility currently supports device-mapper devices (DM),
including LVM volumes and software RAID MD devices. LVM volumes are handled directly using the lvm(8)
command, the rest of device-mapper based devices are handled using the dmsetup(8) command. MD devices
are handled using the mdadm(8) command.
OPTIONS
-d|--dmoptions dm_options
Comma separated list of device-mapper specific options. Accepted dmsetup(8) options are:
retry Retry removal several times in case of failure.
force Force device removal.
-e|--errors
Show errors reported from tools called by blkdeactivate. Without this option, any error messages
from these external tools are suppressed and the blkdeactivate itself provides only a summary
message to indicate the device was skipped.
-h|--help
Display the help text.
-l|--lvmoptions lvm_options
Comma-separated list of LVM specific options:
retry Retry removal several times in case of failure.
wholevg
Deactivate the whole LVM Volume Group when processing a Logical Volume. Deactivating the
Volume Group as a whole is quicker than deactivating each Logical Volume separately.
-r|--mdraidoptions mdraid_options
Comma-separated list of MD RAID specific options:
wait Wait MD device's resync, recovery or reshape action to complete before deactivation.
-m|--mpathoptions mpath_options
Comma-separated list of device-mapper multipath specific options:
disablequeueing
Disable queueing on all multipath devices before deactivation. This avoids a situation
where blkdeactivate may end up waiting if all the paths are unavailable for any underlying
device-mapper multipath device.
-o|--vdooptions vdo_options
Comma-separated list of VDO specific options:
configfile=file
Use specified VDO configuration file.
-u|--umount
Unmount a mounted device before trying to deactivate it. Without this option used, a device that
is mounted is not deactivated.
-v, --verbose
Run in verbose mode. Use -vv for even more verbose mode.
EXAMPLES
Deactivate all supported block devices found in the system, skipping mounted devices.
# blkdeactivate
Deactivate all supported block devices found in the system, unmounting any mounted devices first, if
possible.
# blkdeactivate -u
Deactivate the device /dev/vg/lvol0 together with all its holders, unmounting any mounted devices first,
if possible.
# blkdeactivate -u /dev/vg/lvol0
Deactivate all supported block devices found in the system. If the deactivation of a device-mapper device
fails, retry it. Deactivate the whole Volume Group at once when processing an LVM Logical Volume.
# blkdeactivate -u -d retry -l wholevg
Deactivate all supported block devices found in the system. If the deactivation of a device-mapper device
fails, retry it and force removal.
# blkdeactivate -d force,retry
SEE ALSO
dmsetup(8), lsblk(8), lvm(8), mdadm(8), multipathd(8), vdo(8), umount(8)