raw-volume interface

raw-volume provides access to a specific disk partition. This interface is restricted because it provides privileged access to device partitions.

The slot is intended to be implemented by a gadget snap and is not provided by the core system snap.

Auto-Connect: no Attributes:

• path (slot): path to device partition e.g. /dev/mmcblk0p1

Caution

This interface controls a resource shared by the whole system. Snaps that use it can be installed as parallel instances, but every instance acts on the same system resource and snapd does not coordinate between them. Make sure each instance manages different resources, or run only one instance at a time. See Snaps that are unsupported as parallel instances for details..

Requires snapd version 2.43+.

To use a disk partition, the snap developer must add plugs: [ raw-volume ] to a snap’s snapcraft.yaml. The snap user can then access a specific disk partition with an interface connection.

Use snap interface raw-volume to see which disk partitions are available on the system for snaps to use:

$ snap interface raw-volume
name:    raw-volume
summary: allows access to specific disk partition
slots:
  - foo:mmcblk0p1
  - foo:mmcblk0p2

Once connected, the consuming snap can use the device via the path specified by the connected slot.