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From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Disk drive handling in assembly
Date: Fri, 04 Oct 2002 02:06:54 GMT
NNTP-Posting-Date: Thu, 03 Oct 2002 19:06:54 PDT
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.
Are all work surfaces of drive handling areas covered with soft ESD
material so that drives may be set down on work sufaces without any
possible mechanical shock?
Are assemblers made aware of the extreme shock sensitivity of drives and
made aware that forcing tools must never be used during installation?
Are ESD procedures equivalent to those needed for semiconductor handling
used in handling disk drives?
Is the mechanical assembly into which drives are mounted designed to
reduce transmission of shock to drives in handling the final assembly?
Does the final product provide for appropriate cooling air for the head
disk assembly and the electronics board mounted to the head disk
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.
... 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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