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Path: utzoo!mnetor!seismo!rutgers!princeton!allegra!alice!mitch
From: mitch@alice.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: 30MB Hard Disk Problem
Message-ID: <7026@alice.UUCP>
Date: Fri, 26-Jun-87 12:51:19 EDT
Article-I.D.: alice.7026
Posted: Fri Jun 26 12:51:19 1987
Date-Received: Sat, 27-Jun-87 09:55:22 EDT
References: <4490004@hpcvc0.HP>
Organization: AT&T Bell Laboratories, Murray Hill NJ
Lines: 26
Summary: Source of ST238/Adaptec 2070a problems revealed

In article <4490004@hpcvc0.HP>, shreeve@hpcvc0.UUCP writes:
> 
>  
> I have been having problems with my 30MB hard disk.  Once the system has warmed up for 20 to 30 minutes the disk works fine.  However, before this period
> the disk boots but typically has read errors reading files from the disk (
> including command files!).  The disk is a 30MB Seagate 238 and the controller
> is an Adaptec 2070A.  If the system is power cycled after the 20 minute warm
> up period everything works fine.  Therefore it seems the problem is heat
> related.  Has anyone else had this problem?  Any solutions?  
> Thanks for your help. 
> 
> Bob Shreeve  HP NID
> (503) 750-2975
> hp-labs!hp-pcd!shreeve

I've talked to folks at both Seagate and Adaptec about this problem, and
both ends agree that the problem is due to a bug in the 2070A controller.
The bug has been fixed in all boards shipped since last October, I believe.
If you get in touch with Adaptec, they'll send you an upgrade kit to
fix the problem.  

The buggy controller does indeed cause overheating of the disk, for reasons
which I don't remember.

Mitch Marcus