Hard drive busy for no reason in linux

When my system is not doing anything (no network activity) the hard drive goes on and works hard.  I did a "top" and no processes are taking over 4% of the CPU.  am running Slackware linux.  

How do I get my Hard drive back ?  If I use the box over time the hard drive activity does decrease but it kills my performance.  I am even having diffaculty writing this paragraph.

Timfox123
TIMFOX123Asked:
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Pete LongTechnical ConsultantCommented:
How big is the swap/page partition? if its very small it may well be getting thrashed, especially if your low on RAM

Pete
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TIMFOX123Author Commented:
I have 128 megs of ram and a 750 meg swap.  

This is just a stock slackware box.  
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TIMFOX123Author Commented:
Umm. sorry about all the submitals.   You see my system was having diffaculties.
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TIMFOX123Author Commented:
I have put in to get this question deleted.  I rebooted and do not have the problem to check the solution with.  This happens from time to time and I would have liked to know what causes this.   It would be bad if this was a production box !!!!!
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