NFS mounted DBs and Vacuum

I have a server for which PG_DATA = /home/maxtor, an NFS mounted
disk.  Normally it works great, but when I try to vacuum, it takes
FOREVER.  Should I not even try to use remote storage like this?  Has
anybody else run into a similar problem?

Thanks in advance,
 -- 
Webb Sprague
Programmer
O1 Communications