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From: LaserMan@cup.portal.com (Bob LaserMan Murrow)
Newsgroups: comp.sys.mac
Subject: Re: Standing Mac II Base Unit on end: NO! NO! NO! NO! NO!
Message-ID: <10258@cup.portal.com>
Date: 20 Oct 88 22:49:45 GMT
References: <3434@cs.utexas.edu> <4215@polya.Stanford.EDU> <316@ivucsb.UUCP
Organization: The Portal System (TM)
Lines: 16

I have been reading all the comments about the mounting orientation. I called
a good friend who happens to be the VP of Eng at Quantum and asked him what
they think about vertical mounting. His response is that the unit is
very tolerant to mounting in any orientation. Their is an increased risk of
a fail to write error occuring if you shock the unit in the x-y plane due to
the servo design. Quantum has added a feature that no other drive maker has 
called a bump detect circut that will make sure that the info is not written
to the wrong track due to a bump in this axixs. he also says that the drive is
very tollerant of jolts in the axis of the spindle and that a head crash is
very unlikely. The airbearing is extreamly rigid as a design. The error will 
be the fail to write variety if anything happens. After all the techi chatter
I asked him what they do, he said, we mount most of them vertically. This info
is valid for only Quantum drives, I would expect that it does hold for others
unless the manufacturer specifically excludes it as does Seagate.
Bob Murrow
laserman@cup.portal.com