How to change pathname prefix

Hi together,

is ther a possibilty to change the root diretory or the pathname prefix under QNX6?

In QNX4 I used
prefix -A /=/ram

The QNX6 docu says something that I should use the ln utility instead with the option -P, but there is no example given how the change the pathname prefix tree of the process manager.
I tried that way:
ln -sP /ram / … now the system cant access the filesystem anymore

Thank you for your help

No, “/” is not changable in QNX6.

Instead you should mount the device that /ram represents as /