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[filmscanners] RE: HD failure [was RE: keeping the 16bit scans}



I cannot speak for anyone else; but I have not and would not know how to
read it if it hit me in the face. The only data I have is what I have heard
informally from manufacturers' technical support people when I had my four
new hard drive failures and we discussed why they may have taken place. They
mention potential heat buildup problems, power surge problems effecting the
drives electronics, and the like. However, I also do presume that the
manufactures have that information and in some detail, although they may not
make it public even in terms of giving general specs.

As for your conclusion about being able to balance out or assess the options
based on that info, I would think that it might not be as simple as that
given that there probably are a lot more variables that come into play in
doing such a comparison such as power fluctuations and surges, heat buildups
within particular enclosures, even possibly magnetic charges, etc.  But even
if it were possible and easy to do, the manufacture's figures would be
averages and not individual cases; thus, any given concrete case might be
the counter-example of the averages which refutes it for that particular
instance.


-----Original Message-----
From: filmscanners_owner@halftone.co.uk
[mailto:filmscanners_owner@halftone.co.uk]On Behalf Of Bob Frost
Sent: Sunday, March 30, 2003 3:57 AM
To: laurie@advancenet.net
Subject: [filmscanners] Re: HD failure [was RE: keeping the 16bit scans}


Laurie,

Have you or anyone else seen data for MTBF due to recycling and MTBF due to
bearing or other failure? Presumably the manufacturers must know how many
startups/downs their drives will survive and how long the bearings will
last. If we had that info we could balance one against the other and see
where the optimum lies.

Bob Frost.


----- Original Message -----
From: "LAURIE SOLOMON" <laurie@advancenet.net>
To: <bob@frost.name>
Sent: Sunday, March 30, 2003 6:30 AM
Subject: [filmscanners] RE: keeping the 16bit scans


 When I say that turning a HD on and off has a negative
effect in terms of wear and tear similar to that which might take place if
one left the HD on all the time, I am speaking on the average and not to any
particular individual case.  Unless, you are prepared to say that turning a
HD on and off does not contribute to its wear and tear, the fact that you
personally only do so once a week is sort of irrelevant as a refutation of
my point. If you backed up or archived once a day every day, woulod you
still be able to clain that the wear and tear of turning the drive on and
off is less than keeping it on all the time during that week?

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