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From: brim@cbmvax.commodore.com (Mike Brim - Product Assurance)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Quantum 40AT Info Needed
Message-ID: <14772@cbmvax.commodore.com>
Date: 1 Oct 90 19:17:30 GMT
References: <9009221643.AA14124@emunix.emich.edu> <14605@cbmvax.commodore.com> <11371@spool.cs.wisc.edu>
Reply-To: brim@cbmvax.commodore.com (Mike Brim - Product Assurance)
Organization: Commodore, West Chester, PA
Lines: 24

In article <11371@spool.cs.wisc.edu> peng@chaource.cs.wisc.edu (PENG) writes:
> In article <14605@cbmvax.commodore.com> brim@cbmvax.commodore.com (Mike Brim - Product Assurance) writes:
> >With the Quantum Prodrive 40AT use 965 cylinders, 5 r/w heads, and 17 sectors/T.
> >This is the logical format.  It physically has 834 cylinders, 3 r/w heads
> >26 sectors/t.
> 
> Hmm...  965*5*17 = 82025  834*3*26 = 65052  I don't get this.  Where do
> these extra 17000 sectors come from?  Am I missing anything?
> 
 My mistake, the Quantum 40AT uses RLL 2,7 encoding which without thinking I 
 gave it 26 sectors.  As you may know this is not always the case.  The 40AT
 has diff. number of sectors depending on the location of the sectors (more in  
 outer tracks, less in inner).  I don't know how many zones are used or the #
 of sectors in each zone.

 Thanks.
-- 
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Disclaimer: My company knows not what I say (or do).

Mike Brim			     |	Commodore Electronics Limited
PC Analyst - System Evaluation Group | 	West Chester, PA 19380
Product Assurance		     |	InterNet: brim@cbmvax.commodore.com
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