# Disk ## Disk Attributes These attributes may be used for any disk related operation. | Attribute | Type | Description | Examples | Stability | | ------------------- | ------ | -------------------------------- | -------- | ---------------------------------------------------------------- | | `disk.io.direction` | string | The disk IO operation direction. | `read` | ![Experimental](https://img.shields.io/badge/-experimental-blue) | `disk.io.direction` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used. | Value | Description | Stability | | ------- | ----------- | ---------------------------------------------------------------- | | `read` | read | ![Experimental](https://img.shields.io/badge/-experimental-blue) | | `write` | write | ![Experimental](https://img.shields.io/badge/-experimental-blue) |