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Date:	Mon, 3 Mar 2003 16:07:50 PST8
From:	"Steven Levine" <steve53@earthlink.net >
Reply-To:	scoug-help@scoug.com
To:	scoug-help@scoug.com
Subject:	SCOUG-Help: Drive stiction ?

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In <3E63B2BE.2CF3@peterskye.com>, on 03/03/03
at 11:53 AM, Peter Skye said:

>long for this list. I was wrong about the definition -- "stiction" isn't
>the bearings, it's where the head sticks to the platter due to too little
>lubricant on that particular drive.

The term stiction is a commonly used term when referring about the
frictional force that needs to be overcome to get an object at the rest
position to the moving state, either rotating or straight line. A Google
search for "bearing stiction" will get you plenty of hits.

Stiction is nasty when doing servo control because it's basically
non-linear.

>MTBF for humans . . . does that include failure due to mental fatigue?

Yep. :-(

>These past few months in San Diego have given me the IQ of a Duck.

So, nothing has changed.

>one). So-o-o, I was wondering how quickly these old drives which have
>run 24x7 for years might develop "stiction". (I found the time last week

The bell curve says it might already have happened. The MTBF says the
probability is low that it has.

>couple of years now. Another "stiction" concern.

The are less likely a problem because there never been any significant
heat to break down the lubricants which I assume are sealed in.

>most of my concerns. Thanks! And if I *do* have a stiction problem,
>Steve Carter told me how to fix it.

There are several common solutions. YMMV.

Steven

--
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"Steven Levine" MR2/ICE 2.35 #10183 Warp4/FP15/14.085_W4
www.scoug.com irc.webbnet.org #scoug (Wed 7pm PST)
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