btrfs-device - Linux


btrfs-device is a command-line tool used for managing the devices that make up a Btrfs file system. It allows users to view information about the devices, add or remove them from the file system, and perform various operations related to device management.


btrfs-device <command> [options] <device>


| Option | Description |
| -i, --info | Display information about the specified device |
| -a, --add | Add the specified device to the file system |
| -r, --remove | Remove the specified device from the file system |
| -f, --force | Force the operation to execute, even if it might cause data loss |
| -v, --verbose | Enable verbose output |
| -h, --help | Display help information |


Simple usage

btrfs-device -i /dev/sda1

Displays information about the /dev/sda1 device in the file system.

Add a device to the file system

btrfs-device -a /dev/sdb1

Adds /dev/sdb1 to the file system.

Remove a device from the file system

btrfs-device -r /dev/sdc1

Removes /dev/sdc1 from the file system.

Common Issues

Error: Device not found.

This error occurs when the specified device does not exist in the file system or is not accessible. Verify the device name and ensure it is connected and properly configured.

Error: Device is in use.

This error occurs when the specified device is still being used by another process or application. Close any programs that may be accessing the device and try again.


Creating a new file system

mkfs.btrfs -f /dev/sdX

Mounting a file system with new devices

mount -o devices=/dev/sda1,/dev/sdb1 /mnt/btrfs

Related Commands

  • mkfs.btrfs: Create a new Btrfs file system.
  • btrfs: General-purpose command for managing Btrfs file systems.
  • btrfs-subvolume: Create and manage subvolumes within a Btrfs file system.