Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!brutus.cs.uiuc.edu!apple!bridge2!ngg
From: ngg@bridge2.ESD.3Com.COM (Norman Goodger)
Newsgroups: comp.sys.mac
Subject: Re: Apple to Fix Quantum Drive Failures
Message-ID: <962@bridge2.ESD.3Com.COM>
Date: 11 Oct 89 21:24:06 GMT
References: <5327@shlump.nac.dec.com>
Reply-To: ngg@bridge2.3Com.com (Norman Goodger)
Organization: 3Com Corp., Mt. View, CA
Lines: 24

In article <5327@shlump.nac.dec.com> long@rainbo.enet.dec.com (Richard Long) writes:

>>Problem: Increased lubricant viscosity in the hard disk drive arm (HDA)
>>assy. Apple's sites high humidity.
>> 
>>Solution: An extended repair program that will continue to October 1991. 
>>The fix will replace a ROM on the HDA controller PWA. Users that have

>umm...err...maybe I'm missing something, but I don't see how the problem
>cited above could be solved by a software fix; sounds like a hardware
>problem to me...


The reason that the ROM fixes the problem is that that the programming
can determine how much current and for how long to apply it to the HDA
assy, which should reportedly overcome the higher lubricant viscosity
problem that occurs over time due to high humidity.


-- 
Norm Goodger				SysOp - MacInfo BBS @415-795-8862
3Com Corp.				Co-SysOp FreeSoft RT - GEnie.
Enterprise Systems Division             (I disclaim anything and everything)
UUCP: {3comvax,auspex,sun}!bridge2!ngg  Internet: ngg@bridge2.ESD.3Com.COM