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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)

COMMENTS