Mmm... As my fuzzy memory recalls, this was the exact situation
that was helped enormously by the minimal head movement logic.
Swap accesses tend to come in pairs: write something out,
and then read something in to replace it. Long sequences of such.
Leaving the heads over the swap area for the duration is a huge
win under such circumstances, as opposed to doing continuous
time-consuming long seeks back and forth from swap to data to swap
to data to..
But there is a theoretical chance for starvation.
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