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From: cjp@beartrk.beartrack.com (CJ Pilzer)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: New 320Meg SCSI drive
Summary: DOS & ESDI drives with >1024 cyls
Keywords: CDC-Imprimis Wren IV
Message-ID: <438@beartrk.beartrack.com>
Date: 22 Aug 90 05:25:32 GMT
References: <26c74115-120.2comp.sys.ibm.pc.hardware-1@vpnet.chi.il.us> <304@smosjc.UUCP>
Organization: Bear Track Computer Co., Takoma Park, MD.
Lines: 19

In article <304@smosjc.UUCP>, richard@smosjc.UUCP (Richard Asano) writes:
> 
> They should be all usable by DOS.  However, my question is can DOS use all
> 335MB?  Assuming 15 heads, 35 sectors/track, 1024 cylinders, and 512
> bytes/track, I get a maximum of 262.5MB.
> 

Well, you ask can you do this without "playing games".  I don't know what
you mean by that, but I have a Maxtor XT-4380E.  It has 1222 cyls.  The way
it is is used is with an adaptec controller which does track translation.
This makes dos think that there are 63 sectors per track and less tracks.
There is software on the controller which formats the disk to do this.  
Using it is easy.  Everything I have tried including Windows 3.0 works just
fine with the disk.  The controller also has a hardware cache.  It is an
Adaptec ACB-2322D.  This controller also has a jumper that can be set to
create two drives from one with more than 1024 cyls, but I don't know of
any one who has tried it.

-- cj