Our servers are fast (Proliant ml370s) running 6.5 sp4, on a GigBit/100 mbit

What I have noticed is a long delay (sometimes up to 15 seconds) on a XP
client to display a listing of a mapped Netware server volume. If you list
the drive contents a second time it is very quick (must be from the cache)
The strange thing is that on the Win 2k clients there is no delay on the
same drive

Any ideas