tldr/pages/linux/bcachefs.md

# bcachefs

> Manage `bcachefs` filesystems/devices.
> Some subcommands such as `device` have their own usage documentation.
> More information: <https://bcachefs-docs.readthedocs.io/en/latest/index.html>.

- Format a partition with `bcachefs`:

`sudo bcachefs format {{path/to/partition}}`

- Mount a `bcachefs` filesystem:

`sudo bcachefs mount {{path/to/partition}} {{path/to/mountpoint}}`

- Create a RAID 0 filesystem where an SSD acts as a cache and an HDD acts as a long-term storage:

`sudo bcachefs format {{[-l|--label]}} {{ssd.ssd1}} {{path/to/ssd/partition}} {{[-l|--label]}} {{hdd.hdd1}} {{path/to/hdd/partition}} --replicas 1 --foreground_target {{ssd}} --promote_target {{ssd}} --background_target {{hdd}}`

- Mount a multidevice filesystem:

`sudo bcachefs mount {{path/to/partition1}}:{{path/to/partition2}} {{path/to/mountpoint}}`

- Display disk usage:

`bcachefs fs usage {{[-h|--human-readable]}} {{path/to/mountpoint}}`

- Set replicas after formatting and mounting:

`sudo bcachefs set-fs-option --metadata_replicas {{2}} --data_replicas {{2}} {{path/to/partition}}`

- Force `bcachefs` to ensure all files are replicated:

`sudo bcachefs data rereplicate {{path/to/mountpoint}}`

- Create a snapshot of a particular directory:

`bcachefs subvolume snapshot {{path/to/directory}} {{path/to/snapshot}}`