Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!ogicse!cvedc!mcspdx!adphdw20!dtb
From: dtb@adpplz.UUCP (Tom Beach)
Newsgroups: comp.os.msdos.apps
Subject: Re: Disk Manager and MSDOS 5.0
Message-ID: <848@adphdw20.UUCP>
Date: 27 Jun 91 15:01:29 GMT
References: <1991Jun18.091756.31516@kuhub.cc.ukans.edu> <1991Jun26.062825.6947@unixg.ubc.ca>
Organization: ADP Dealer Services R&D, Portland, OR
Lines: 18

In article <1991Jun26.062825.6947@unixg.ubc.ca>, thochin@unixg.ubc.ca (Thochin Chua) writes:
> 
> Unfortunately, DOS 5.0 (and probably ALL figure versions of DOS) will not work with the wonky drives that have more than 1024 cylinders. Granted that almost all modern drives use greater number of platter to increase capacity than to increase the number o> f cylinders, it's getting rare to find drives with greater than 1024 cylinders anyways. Unfotunately, I'm one of those unlucky ones who have to still use SpeedStor 8(.
> 
That's not quite true, actually MOST modern drives have well over 1024
cylinders. They also use the embedded AT interface, sometimes called ide.
This allows them to mask the "true" disk geometry from the BIOS and OS.
This also allows use of zone bit recording (ZBR) techniques. Something
else that the BIOS can't cope with.

Tom Beach

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|  Tom Beach : Sr Project Engineer : Mass Storage Technology             |
|  phone : (503) 294-1541                                                |
|  email : uunet : dtb@adpplz.uucp                                       |
|  ADP Dealer Services, ADP Plaza, 2525 S.W. 1st Ave, Portland OR, 97201 |
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