BLKDEACTIVATE(8)

NAME
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)