Provided by: dmsetup_1.02.155-2ubuntu6_amd64 bug

NAME

       blkdeactivate — utility to deactivate block devices

SYNOPSIS

       blkdeactivate    [-d dm_options]    [-e]    [-h]    [-l lvm_options]    [-m mpath_options]
       [-r mdraid_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.

       -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.

       -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.

       -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), umount(8)