My computer runs Fedora Core 2 and I'm getting "server is down" when I try to mount the NSLU2. What's going on?

Fedora Core 2 uses NFS protocol version 3 by default. You need to pass the nfsvers option to the mount command in order to force the NFS client to use an older protocol version: mount -t nfs -o nfsvers=2 <nslu2 ip>:/share/hdd /mnt