blkdeactivate man page

blkdeactivate — utility to deactivate block devices

Synopsis

blkdeactivate [-d dm_options] [-e] [-h] [-l lvm_options] [-m mpath_options] [-u] [-v] [device]

Description

blkdeactivate utility deactivates block devices. If a device is mounted, the utility can 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, --dmoption 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 about device being skipped or not.
-h, --help
Display the help text.
-l, --lvmoption 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 Volume Group as a whole takes less time than deactivating each Logical Volume separately.
-m, --mpathoption mpath_options

Comma separated list of device-mapper multipath specific options:

disablequeueing
Disable queueing on all multipath devices first before deactivation. This avoids a situation where blkdeactivate may end up waiting if all paths are unavailable for any underlying device-mapper multipath device.
-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. If a device is mounted, skip its deactivation.

blkdeactivate

Deactivate all supported block devices found in the system. If a device is mounted, unmount it first if possible.

blkdeactivate -u

Deactivate supplied device together with all its holders. If any of the devices processed is mounted, unmount it first if possible.

blkdeactivate -u /dev/vg/lvol0

Deactivate all supported block devices found in the system. Retry deactivation of device-mapper devices in case the deactivation fails. 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. Retry deactivation of device-mapper devices in case the deactivation fails and force removal.

blkdeactivate -d force,retry

See Also

dmsetup(8), lsblk(8), lvm(8), mdadm(8), multipathd(8), umount(8)

Info

LVM TOOLS 2.02.167(2) (2016-11-05) Red Hat, Inc