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Path: utzoo!watmath!clyde!rutgers!ames!amdahl!bnrmtv!perkins
From: perkins@bnrmtv.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: RLL controller
Message-ID: <1391@bnrmtv.UUCP>
Date: Thu, 5-Feb-87 00:05:32 EST
Article-I.D.: bnrmtv.1391
Posted: Thu Feb  5 00:05:32 1987
Date-Received: Sat, 7-Feb-87 11:49:31 EST
References: <1083@ethos.UUCP> <1373@bnrmtv.UUCP> <2622@iuvax.UUCP> <1435@tekigm2.TEK.COM>
Organization: Bell Northern Research, Mtn. View, CA
Lines: 25

[Tim was referring to my problem -- not being able to boot from a
 cheap (Disctron) hard disk formatted with an Adaptec 2070B RLL
 controller:]

> So, either you have formatted the disk improperly, or, cylinder 0, head 0, and
> sector 1 is marked defective.
> 
> Good luck... (if you see the message XXXX bytes in bad tracks when you run
> CHKDSK, the problem is more than likely the second case).
>
> Tim Margeson  {amd..hplabs}cae780!tektronix!tekigm2!timothym

I don't see ANY bytes in bad tracks from CHKDSK -- the bad sector
marking is done at the controller level.  I get a somewhat smaller
disk capacity than would otherwise be the case, but there's an
improvement in performance over having DOS manage bad clusters.

I suppose there could be a problem at the physical boot location,
but that wasn't on the list written on the disk drive.  I could
reformat it and check again, I suppose.
-- 
{hplabs,amdahl,3comvax}!bnrmtv!perkins        --Henry Perkins

It is better never to have been born.  But who among us has such luck?
One in a million, perhaps.