huopio@kannel.lut.fi (Kauto Huopio) (01/10/90)
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 When low-level formatted with these values the DEBUG formatting prg finds the disk full of bad tracks.. HELP please.. --Kauto -- ****************** Kauto Huopio (huopio@kannel.lut.fi) ********************** *US Mail: Kauto Huopio, Punkkerikatu 1 A 10, SF-53850 Lappeenranta, Finland * *Project: Learn some GNU Emacs first.. :-) * *****************************************************************************
JLI@kuhub.cc.ukans.edu (01/10/90)
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).
dougm@palomar.SanDiego.NCR.COM (Doug Marshall) (01/11/90)
Apologies for posting rather than e-mailing. I've included the entire file
that came back to me when I tried to 'R'eply to you directly.
****************************** CUT HERE *************************************
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Subject: Re: HELP! Mitsubishi HD dead ?!?
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In-Reply-To: <HUOPIO.90Jan9224649@kannel.lut.fi>
Organization: NCR Corporation, Rancho Bernardo, CA
Cc:
In article <HUOPIO.90Jan9224649@kannel.lut.fi> you write:
>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
>
I don't think so. I have the same drive and the CMOS BIOS reports that I have
it defined as having 977 cylinders, 5 heads, Precomp 300, Landing zone 978 and
17 sectors per track. I did not low level format the drive myself. It was
done by the technician where I bought it. I also have the same controller as
your friend. I'm running my controller/drive in a 12MHz '286. I am also using
RLL 1:1 as is your friend. Hope this helps.
Cheers!
-- Doug
--
----
Doug Marshall <Doug.Marshall@SanDiego.NCR.COM> * My humble opinions and
+1 619 485 3494 <...!ncr-sd!palomar!dougm> * and ideas are just that.
"All of us is smarter than each of us!"
----
Doug Marshall <Doug.Marshall@SanDiego.NCR.COM> * My humble opinions and
+1 619 485 3494 <...!ncr-sd!palomar!dougm> * and ideas are just that.
"All of us is smarter than each of us!" dgs@swdev.Waterloo.NCR.COM (David G. Schwartz) (01/11/90)
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 >When low-level formatted with these values the DEBUG formatting prg >finds the disk full of bad tracks.. HELP please.. > >****************** Kauto Huopio (huopio@kannel.lut.fi) ********************** >*US Mail: Kauto Huopio, Punkkerikatu 1 A 10, SF-53850 Lappeenranta, Finland * >*Project: Learn some GNU Emacs first.. :-) * >***************************************************************************** I think I can reply to this - I have a Mitsu MR535U and a DTC 7287 1:1 RLL controller. My BIOS setup (AMI 386 BIOS) is: type 17, cyln 977, heads 5, Wcom 300, Lzone 977, Sec 17, Size 41 MB. The DTC ROMS take care of remapping into RLL format when you boot. The DTC CMOS on-board configuration (using DEBUG and "g=c800:5") adds: "CTRL=00" and "SECTOR/TRK=26" Note there is no size specified in the DTC setup. Under DOS 3.30, this gives me 2 partitions of 32Mb and 29.5Mb. Any more questions, don't hesitate to ask. -- Remember: Net.advice is usually worth what you pay for it. UUCP: {world}!uunet!ncrlnk!ncrwat!dgs VOICE: (519) 884-1710 x581 NCR: <dave.schwartz@Waterloo.NCR.COM> NCR Inet 643-1581