A.P. Lawrence

disk geometry dparam

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From: Mike Brown <mike@tkg.ca>
Subject: Re: OSR 5.0.6a Strange problem after BIOS upgrade FLASH and IDE References: <Pine.SC5.4.43.0201161231040.3858-100000@xenau105.zenez.com>
Date: Fri, 18 Jan 2002 02:16:27 GMT

Boyd Lynn Gerber wrote:
> 
> Thanks to Bela for the below.  I was able to recover the data on the HD.
> 
> On Sun, 13 Jan 2002, Bela Lubkin wrote:
> > Since you have a new blank-slate Unix install on the 80GB drive, and
> > have the 40GB drive in place, you're most of the way there.  You need to
> > do something like:
> >
> >   strings -a /dev/rhd20 | grep cyls= > /tmp/old-parms
> 
> I found 9693 128 63 as the correct parameters.
> 
> >   dparam /dev/rhd10                         # print existing parms
> >   dparam /dev/rhd10 cyls hds ... cyls secs
> 
> dparam /dev/rhd20 9693 128 0 0 0 8 19157 63 and setting the bios to auto
> was the solution.
> 
> I have found through a bit of testing that after a HD has been installed
> and working to not run the BIOS HD detect when adding a new HD.  It is
> better to manually set it up with the proper HD settings.
> 
> Thanks to every one.  I was finally able to recover my friends data.
> 
> Good Luck
> 
> --
> Boyd Gerber <gerberb@zenez.com>
> ZENEZ   3748 Valley Forge Road, Magna Utah  84044

I may have been a bit terse in my previous post, but basically I have
had to set the correct settings for IDE after the BIOS has changed
them for me.  The steps that somehow where important for me was to
boot the system with no hard drives, clear the bios settings, then
reconnect the original hard drive, then manually configure the original
settings.  The drive remained unbootable until I had clear the BIOS with
no HD attached.

Getting the RecoverEdge report on drive parameters saved the day.

-- 
Michael Brown

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