I figure the head is moving back and forth between these places
anyway, so if I put swap in the middle it won't add that much seek
loading.
On an good disk these days, a seek takes .000008 sec.
a 8k transfer on a 5meg/second disk takes .0016384 sec.
Doing an average seek between each write would only slow you down from
5meg to sec to 4.86meg/sec
The seek time is eaten by the transfer time.