In message D96E2AFA0DF3D211B13900902745494803736153@helios.gnv.tcc.thomson-csf.com you wrote:

I am working on a custom board with a mpc860.

First I started my target with NFS as rootfilesystem. It works fine. Now I want to use Initrd to start. It works fine. But I can't mount NFS -> timeout error .

Did you remember to either start the portmapper, or to use the "-o nolock" option?

For my initrd I use the ram image from Denx.

Any known problem in "mount" from busybox ?

No.

Ummm... and what has this to do with U-Boot?

Wolfgang Denk