rrestore and setsockopt interaction?

[Steve Kargl]

I'm trying to use rrestore to move filesystems from 
an old i386 FreeBSD system to a new amd64 FreeBSD 
system.  My attempt is met with

dhcp-78-74:kargl[39] rrestore xbf 64 troutmask:/dev/nsa0
Connection to troutmask.apl.washington.edu established.
IP_TOS:IPTOS_THROUGHPUT setsockopt: Operation not supported
TCP_NODELAY setsockopt: Operation not supported

Do I need to fiddle with a sysctl variable?

-- 
Steve