samba over nfs?

[chammer]

i've recently added a new machine to the land that i want to act as a fileserver "hub" of sorts. i have nfs exports going into this machine from a single linux box, and samba shares coming into this machine from two windows machines.

i currently have something like: /home/nfs/<machine name>

this is for both the linux and windows shares, so that everything is under a central main directory.

now, my goal is to be able to add /home/nfs to /etc/exports, and share out all the network shares from this machine, to the other machines on the lan.

the problem im having though, is for the samba shares (when added to /etc/exports), return the following error:

Aug 9 18:32:13 XXX rpc.mountd: authenticated mount request from XXX:909 for /home/nfs/XXX (/home/nfs/XXX)
Aug 9 18:32:13 XXX rpc.mountd: getfh failed: Operation not permitted

this seems to point to either a configuration issue, or built-in security measure that im unaware of.

is what im trying to do possible, or am i stuck doing this for now? eventually im going to be implementing a real file server for my local lan, but until i can do that and centrally locate my data...im forced to split it up to various machines for the time being due to space issues.

just looking for any hints as i've been unable to find anything via google.

one more quick question too... my windows mounts are mounted like:
//XXX/XXX on /home/nfs/XXX type cifs (rw,mand)

...any clues as to what the 'mand' option is? it added that by default.

thanks.
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echo '[q]sa[ln0=aln256%Pln256/snlbx]sb3135071790101768542287578439snlbxq' | dc
echo '16i[q]sa[ln0=aln100%Pln100/snlbx]sbA0D4D465452snlbxq' |dc

[desultory]