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From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: Disk drive handling in assembly
References: <3D9CF7A9.BF4BB1C0@webaccess.net> <email@example.com>
Date: Fri, 04 Oct 2002 12:36:57 GMT
NNTP-Posting-Date: Fri, 04 Oct 2002 05:36:57 PDT
Nico Coesel wrote:
> Chuck Simmons wrote:
> >I have a few questions about how hard drives are handled in assembly
> >situations when hundreds or thousands of drives might be handled in a
> >day. The motive for this question derives from a question about high
> >failure rate experienced by a particular company. I have already given
> >my views on the problem to the engineering VP of the company and I am
> >arraging a consultant to check my conjectures and look for other
> >problems. But my questions concern how other companies handle hard
> >drives. My questions are the following.
> I've had a discussion with several other people about similar
> problems. It seems that some batches are transported more carefully
> than others. This causes some companies to receive a batch with a high
> failure rate while other companies have near no zero problems with a
> particular type of disk.
Handling damage in small drives makes transportation damage a sort of
background noise. In the 3.5 inch drives, I know of no documented case
of systematic shipping damage while installation handling damage has
been documented many times. I was asked to look at this from the drive
maker's point of view since that is where I come from. Transportation
damage is very low probability from that point of view. Handling damage
is definitely the front runner.
> >I am little interested in this in that all of the things in my questions
> >have been contributors to drive failure in the past. I am no longer
> >involved in disk related business but I do get questions from time to
> >time about them.
> Another possible cause of failure is heat. In most clone PC's the
> harddrives aren't cooled properly and therefore get really hot while a
> harddrive only consumes about 8W...
The drives are not in computers and they are cooled by fans. It was
realized by the company that drives that never stop seeking over their
installed operating life consume considerably more than 8W.
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org
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