*BSD News Article 10799


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From: toonen@mcs.anl.gov (Brian R. Toonen)
Subject: IDE Drive Translation
Message-ID: <1993Feb5.162455.1030@mcs.anl.gov>
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Organization: Argonne National Laboratory, Chicago, Illinois
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Date: Fri, 5 Feb 1993 16:24:55 GMT
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Could someone please send me some information (or a location where
information can be obtained) on IDE drive translation.  I have a
Micropolis 2112A 1001Mb IDE drive with 2034 cylinders, 16 heads, and
63 sectors/track.  I had a 200Mb DOS partition, a 200Mb partition
which was reserved for NT and 600Mb for 386BSD.

Normally, the DC-680 IDE adapter translates the drive into 1017
cylinders with 32 heads. In order to get 386BSD to work, I had to
disable the translation option on the IDE adapter.  This caused DOS to
report that only a 503Mb drive was installed.  This was not a problem
until I attempted to install NT.

  Apparently, NT did not like the 600Mb 386BSD partition.  While
trying to format the second parition, it destroyed the 386BSD
partition and then the format program died with complaints of lacking
memory (I have 16Mb).  I removed the 600Mb partition and tried to
install NT again; this time it was successful.  I can now reinstall
386BSD, but anytime I have to reformat NTFS (likely to occur), I will
have to remove 386BSD first.

The solution would appear to be to switch the drive back to translated
mode, but this would cause BSD to fail (being my favorite of the three
OS's, that would not be the desired effect).  Any suggestions or
comments other than to remove NT would be greatly appreciated.

Brian R. Toonen

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| Brian R. Toonen                           | I speak only for   |
| Mathematics and Computer Science Division | myself and not for |
| Argonne National Laboratory               | my employer!       | 
| toonen@mcs.anl.gov                        |                    |
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