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📖 NAME

blkdeactivate — utility to deactivate block devices

🚀 Quick Reference

Use Case	Command	Description
Deactivate all supported block devices (skip mounted)	blkdeactivate	Deactivates all DM, LVM, and MD devices, skipping any that are mounted.
Deactivate all, unmounting mounted devices first	blkdeactivate -u	Unmounts mounted devices before deactivating them, if possible.
Deactivate a specific device with its holders	blkdeactivate -u /dev/vg/lvol0	Unmounts and deactivates the specified logical volume and its holders.
Deactivate all, retry DM failures, deactivate whole VG	blkdeactivate -u -d retry -l wholevg	Unmounts, retries DM removal on failure, and deactivates each LVM Volume Group as a whole.
Deactivate all, force removal and retry on DM failure	blkdeactivate -d force,retry	Forces removal and retries if device-mapper deactivation fails.

📋 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.

🔹 -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.

🔹 -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)

Red Hat, Inc LVM TOOLS 2.03.11(2) (2021-01-08) BLKDEACTIVATE(8)

📖 NAME 🚀 Quick Reference 📋 SYNOPSIS 📝 DESCRIPTION ⚙️ OPTIONS 🧪 EXAMPLES 🔗 SEE ALSO