truenas/library/common/docs/persistence/device.md

Device

Key	Type	Required	Helm Template	Default	Description
persistence.[volume-name].hostPath	string	✅	✅	""	Define the hostPath
persistence.[volume-name].hostPathType	string	❌	✅	""	Define the hostPathType

device type is pretty much the same as hostPath. The only difference is that if a device type is defined. We can take additional actions, like setting supplementalGroups to the container assigned, so it can utilize the device.

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Notes:

View common keys of persistence in persistence Documentation.

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Examples:

persistence:
  dev-vol:
    enabled: true
    type: device
    hostPath: /path/to/host
    hostPathType: BlockDevice