> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Storage features

The following features are supported for the various storage types on Qualcomm® Linux®.

## UFS device features

The following UFS device features are supported.

| Feature             | Description                                                                                                                                                                                                                                 |
| ------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Number of lanes     | Only 2 lanes are supported.                                                                                                                                                                                                                 |
| Gear                | High-speed (HS) Gear 1, 2, 3, and 4 are supported.                                                                                                                                                                                          |
| Low-power mode      | Supports link hibernate and device sleep modes. For more information about the supported modes, see [UFS power management states](https://dragonwingdocs.qualcomm.com/System/Memory-and-Storage/configuration/ufs-power-management-states). |
| Embedded UFS device | Supports only the embedded UFS device. Hot plug isn't supported.                                                                                                                                                                            |

## eMMC features

The following eMMC features are supported.

| Feature         | Description                                                                                             |
| --------------- | ------------------------------------------------------------------------------------------------------- |
| Speed           | DDR50, HS200, HS400, HS400 Enhanced mode                                                                |
| Sleep mode      | Supports clock gating and auto suspend features. See eMMC power management states for more information. |
| Command queuing | Supports multiple commands to be sent to the storage device at once.                                    |

## SD card features

The following SD card features are supported.

| Feature             | Description                     |
| ------------------- | ------------------------------- |
| Number of bits      | SD card operates in 4-bit mode. |
| Speed               | SDR50, SDR104, DDR50            |
| Hot-plug capability | Supports hot plug capability.   |

## NVMe features

The following NVMe features are supported.

| Feature   | Description                                                                                                                               |
| --------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
| Lanes     | 4 lanes are supported for NVMe over the PCIe port (PCIe1).                                                                                |
| Interface | NVMe provides a high-speed serial interface.                                                                                              |
| Protocol  | The NVMe protocol optimizes NAND flash and next-generation SSD technologies, enabling efficient command processing and reducing overhead. |