> For the complete documentation index, see [llms.txt](https://dev.solid-run.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.solid-run.com/marvell/a38x/sbc-platform/a388-other-articles/switching-pcie-to-msata.md).

# Switching PCIe to MSATA

The mini-pcie slots on the top of the board can be configured to be either SATA or PCIe. This configuration does not auto-detect yet and needs to be hard coded in u-boot. I can add a u-boot env variable to switch between them. You need to modify the #if 1 to #if 0 in the following two places –\
[https://github.com/SolidRun/u-boot-armada38x/blob/u-boot-2013.01-15t1-clearfog/tools/marvell/bin\_hdr/src\_phy/a38x/mvHighSpeedTopologySpec-38x.c#L92](https://github.com/SolidRun/u-boot-armada38x/blob/u-boot-2013.01-15t1-clearfog/tools/marvell/bin_hdr/src_phy/a38x/mvHighSpeedTopologySpec-38x.c#l92)

and

[https://github.com/SolidRun/u-boot-armada38x/blob/u-boot-2013.01-15t1-clearfog/tools/marvell/bin\_hdr/src\_phy/a38x/mvHighSpeedTopologySpec-38x.c#L98](https://github.com/SolidRun/u-boot-armada38x/blob/u-boot-2013.01-15t1-clearfog/tools/marvell/bin_hdr/src_phy/a38x/mvHighSpeedTopologySpec-38x.c#l98)

This will modify the SERDES of the PEX (pcie) to become a SATA port

### Bootdevice (Dipswitch)

On both carrier boards – the boot device can be chosen by using the SW1 Dipswitch.

![](/files/mZqhhgzuIzGhZdOUXCtd)

{% hint style="info" %}
White is the dip position. Black is the background.
{% endhint %}

{% hint style="warning" %}
UART Booting does **not** work with above configuration! Instead, use **01001** where 1 means on, and 0 means off.
{% endhint %}

{% hint style="warning" %}
Additional Information: If the SOM has eMMC onboard – SD interface will not work.
{% endhint %}


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