nbd-server processes

[Claude Paroz]

Hi,

I'm running Edubuntu 6.10. I checked today the processes running on my 
server, and I saw several instances of processes like this:

nobody   27680  0.0  0.0   1660   476 ?        S    Nov29   0:00 /bin/sh /usr/sbin/nbdswapd
nobody   27683  0.0  0.0   3236   728 ?        S    Nov29   0:00 /bin/nbd-server 0 /tmp/fileSsyfIO

even if I know there's no more client connected.

Is this normal? Is it a bug? Shouldn't these processes closed when clients disconnect ?

Regards.

Claude