On Mon, 02 Apr 2018 19:18:10 +0200, Bernd wrote:

> Hi,
>
> I want to move the root-Dir to an other device. Away from the SD-card.
> Boot-Dir and Start-Files can rest on SD-Card.
>
> I have an other device /dev/sdb and copied all files and directories
> from the root of the SD-card to the new partition /dev/sdb1.
>
> I think that in the file /boot/cmdline.txt I can do the trick.
>
> But then I am clueless.
>
> What Do I have to configure?
>
> What is the way RasPi boots up?
>
> Bernd

With a normal linux, you do it in /etc/fstab.

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