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From: firstname.lastname@example.org (milne_v)
Subject: Re: Disk drive handling in assembly
Date: 5 Oct 2002 13:16:12 -0700
References: <3D9CF7A9.BF4BB1C0@webaccess.net> <email@example.com> <3D9D1517.F9300485@webaccess.net> <3D9D9C2D.597669CD@webaccess.net>
NNTP-Posting-Date: 5 Oct 2002 20:16:13 GMT
Chuck Simmons wrote in message
> I didn't ask which way up the drives are mounted. I never heard of any
> sensitivity to that when there is forced air cooling. I can't think of
> anything inside of a head disk assembly that has any orientation
> sensitivity. All of the bearings are dead loaded and up heads and down
> heads refers to gimble orientation rather than load direction unless
> that has changed. The other engineer considering this issue is a
> mechanical engineer and he didn't ask about orientation either. Do you
> have evidence that it matters?
It used to matter, and we learned to install drives either horizonltal
or vertical, but never up-side-down. I used to remember why, it had
something to do with the bearing. Maybe it's not a issue with newer
product, it's just a rule of thumb I stuck by.
> As it happens, I probably know some of the people who designed these
> drives since I think I know where they were designed (brand and type
> give me a big clue that the drives are probably not Silicon Valley,
> Irvine CA or Shrewsbury MA designs).
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