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From: JLI@kuhub.cc.ukans.edu
Newsgroups: comp.sys.ibm.pc
Subject: Re: HELP! Mitsubishi HD dead ?!?
Message-ID: <21018@kuhub.cc.ukans.edu>
Date: 10 Jan 90 05:22:40 GMT
References: <HUOPIO.90Jan9224649@kannel.lut.fi>
Distribution: comp
Organization: University of Kansas Academic Computing Services
Lines: 26

In article <HUOPIO.90Jan9224649@kannel.lut.fi>, huopio@kannel.lut.fi (Kauto Huopio) writes:
> Mu friend bought a BEAR 386 with a Mitsinbishi MR535-U00 drive and
> DTC RLL 1:1 controller..
> 
> Now: Are these settings right for the drive?
> 
> Cylinders 980 Heads 5 Precomp 0 Landing zone 981 Sect/trk 26

  We were using DTC-7287 RLL 1:1 controllers with MR535-U00 drives
a lot, but our settings were:

  Cyl. 977 Hd. 5 Precomp None Landing Zone 976 Sect/Trk 26

They are working fine if we are not using Xenix 386 operating
system.  For Xenix, we chose:

  Cyl. 977 Hd. 5 Precomp 300 Landing zone 976 Sect/Trk 26

For some reason, which we haven't bother to figure out, selecting
precomp 0 or None will cause system divide overflow when installing
Xenix.

  In general MR535-U00 is very reliable drive.  We have installed 
a few hundred of them last year and have only seen 3 malfunction
ones.  However, the DTC controller is relatively unreliable, and
the defective rate is a little too high (relatively speeking).