Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site eneevax.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!whuxl!whuxlm!akgua!gatech!seismo!umcp-cs!eneevax!hsu From: hsu@eneevax.UUCP (Dave Hsu) Newsgroups: net.micro Subject: Re: sideways hard disks Message-ID: <459@eneevax.UUCP> Date: Tue, 17-Dec-85 21:26:27 EST Article-I.D.: eneevax.459 Posted: Tue Dec 17 21:26:27 1985 Date-Received: Fri, 20-Dec-85 01:15:39 EST References: <790@brl-tgr.ARPA> Reply-To: hsu@eneevax.UUCP (Dave Hsu) Organization: Imperial Widget Research Center, Kingdom of Maryland Lines: 24 Keywords: heat; Summary: but then again... In article <790@brl-tgr.ARPA> MEAD@usc-eclb.arpa (Dick) writes: >The head-arm assemblies are built with flex tension forcing the head onto >the disk platter and the heads are forced away and fly due to the turbulence >caused by the spinning disk platters ( a very simplistic explaination, I know) >so it does not matter which orientation the disk is in, other than to provide >for ventilation or reduction of heat on the pc card attached >Most disk makers state in their specs that orienation is not a factor. >------- On the other hand, the platter assembly is usually mounted directly to the bottom of the case, and some warpage occurs if too much heat builds up, affecting the angle between the heads and the platters. I'm not certain what effect mounting the drives sideways has on this warpage, but I suspect it may become worse as the the weight of the platters will torque the spindle instead of moving it towards the base of the drive housing. Comments? -dave -- David Hsu Communication & Signal Processing Lab, EE Department University of Maryland, College Park, MD 20742 hsu@eneevax.umd.edu {seismo,allegra}!umcp-cs!eneevax!hsu CF522@UMDD.BITNET And then there were none.