Conner CP30104 120MB Hard Drive Installation Problem

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NGAI KIN YEN KENNETH

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Aug 5, 1991, 3:29:03 AM8/5/91
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My friend has a Conner CP30104 120MB hard drive. When he installed
the hard drive using type 47, he entered parameters as follow:

cylinders : 1522
heads : 4
sectors : 39

Landing zone and precomm were set to 0. When running the program "fdisk",
under DOS 5.0, DOS only recognized 38MB, not 115 MB as indicated in the setup
(Phonix BIOS). The mother board is made by Magus and the system is 386-33.
Are the parameters correct? I know that DOS can only recognize up to 1024
cyclinders, so is there any trick to make DOS recognize more than 1024
cyclinders?

Any help appreciate.

Thank you

kn...@ee.ubc.ca
08/06/91

Bob Gettys N1BRM

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Aug 13, 1991, 9:46:11 PM8/13/91
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In article <1991Aug5.0...@ee.ubc.ca>, kn...@ee.ubc.ca (NGAI KIN YEN KENNETH) writes...


There are two different sets of paramaters that are reccomended for
this drive, since you have a type 47 you should use

heads 8
cylinders 761
precomp 0
landing zone 0
sectors 39

Or you can use drive type 9 which will give you 112megs.


Since you noticed that the parameters are VERY different for the two
drive types I mentioned from those that you listed, realize that the ones you
listed are probably the actual physical drive parameters (I can't check this
with the info I have at hand), but that the ones I listed are either at or
below the number of actual blocks that are on the drive. The controller that is
built into the drive (that circuit board on its bottom) is what's known as a
translating controller. It will take the info that you set up via the bios and
convert from that information to the actual physical paramaters for the drive
totally internaly to the drive. You won't (in fact can't) see this translation
taking place.

Trust me - it works. I have two of these drives working in my 386-25 on
my desk at work.

/s/ Bob Gettys

halcyon...@seattleu.edu

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Aug 13, 1991, 9:17:50 PM8/13/91
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kn...@ee.ubc.ca (NGAI KIN YEN KENNETH) writes:

> My friend has a Conner CP30104 120MB hard drive. When he installed
> the hard drive using type 47, he entered parameters as follow:

> cylinders : 1522
> heads : 4
> sectors : 39

> Are the parameters correct? I know that DOS can only recognize up to 1024


> cyclinders, so is there any trick to make DOS recognize more than 1024
> cyclinders?

Set it up for 8 heads, 761 cylinders and 39 sectors. He'll get close
to 120 megs (I think I have 117). Most IDE drvies over 1024 cyls.
can be set up by halving one parameter and doubling another.

Victor Menayang

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Aug 14, 1991, 1:32:43 AM8/14/91
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In article <26...@shlump.lkg.dec.com> get...@regent.enet.dec.com (Bob Gettys N1BRM) writes:
>
>
> There are two different sets of paramaters that are reccomended for
>this drive, since you have a type 47 you should use
>
>heads 8
>cylinders 761
>precomp 0
>landing zone 0
>sectors 39
>
> Or you can use drive type 9 which will give you 112megs.
>

While similar parameters will certainly work due to the translate mode
the Conner tech support I spoke to the other day gave me the following
parameters:

heads 8
cylinders 762
precomp 0
lzone 762
sectors 39

--
Victor Menayang vic...@ccwf.cc.utexas.edu (Internet)
vm@UTXVM (BITNET)
...!cs.utexas.edu!ut-emx!rtf1000 (UUCP)
-------------------------------------------------------------

Gordon Storga

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Aug 15, 1991, 11:45:57 AM8/15/91
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kn...@ee.ubc.ca (NGAI KIN YEN KENNETH) writes:
> My friend has a Conner CP30104 120MB hard drive. When he installed
> the hard drive using type 47, he entered parameters as follow:

> cylinders : 1522
> heads : 4
> sectors : 39
>
> Are the parameters correct? I know that DOS can only recognize up to 1024
> cyclinders, so is there any trick to make DOS recognize more than 1024
> cyclinders?

Although I sent you the Connor Tech Support phone number, I'd thought I'd
add two things:

1. According to Connor the landing zone is _very_ important to reliable
performance of the drive.

2. The Everex IDE card I tried didn't work worth sh*t. I had to go back
to a "dumb" card that actually gave me better performance. I recommend
you stay away from Everex cards unless you have very good tech support on
them.


Gordon
--
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DJR feels the need to see a disclaimer that says the opinions presented here
are my own and not those of my employer. Perhaps I granted him more sense
than I should have.

Brian Heagney

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Aug 15, 1991, 11:14:55 PM8/15/91
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------------------


EXCUSE ME? What you put above is entirely correct! Though I have a Phoneix
Bios and I used 47 also. My heads were different because I have a 105mb LPS
IDE Quantum. Though, what you said about DOS 5.0 is INCORRECT! Let me tell
you a little story.....

One night I installed my 105mb Quantum and got it installed and had problem
formatting the drive. It kept giving me a INIT 24 error. I said
what is going on? I spent 3 hours trying to figure it out,
formatting-reformatting, I thought it was DOS 5.0 also! My drive has a 64k
cache buffer on it, though my IDE card also has an option for buffered or
unbuffered, well I had the card set to buffered also, when I moved the pin to
unbuffered, DOS 5.0 formatted the hard drive to around 105.3megs.....all is
fine, and faster than heck, no cache software, I don't need it.


DOS is VERY STABLE...including problems some people said they had, though it
was a minor thing that they DIDN'T read the instructions (online Help)...

------------------

There's my 2 cents. Any responses go ahead and nail me to the wall! :>

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faza...@googlemail.com

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Apr 16, 2015, 9:34:30 AM4/16/15
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HI

I am looking for an old conner hard drive (CFS1275A)
I have one that has lots of memories on it and would like to recover the data

I was wondering if you may have the above drive or similar that you could donate please

Thanks in advance
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