Re: MFM drive gone nuts

From: Gerrit Heitsch <>
Date: Wed, 23 Jul 2014 16:51:00 +0200
Message-ID: <>
On 07/23/2014 01:03 AM, Clockmeister wrote:
> BTW, DRAM is sensitive to voltage, especially ripple, in my experience
> and a bad supply will kill DRAM even if the voltages read OK on a
> multimeter.

On the other hand, I have inserted a DRAM the wrong way more than once. 
That reverses +5V and GND. System didn't come up, I noticed the error, 
turned it off again, inserted the DRAM the right way and everything 
worked flawlessly.

Back to the issue with MFM drives... My largest annoyance back then was 
that most makers did NOT print the parameters onto the drive. They only 
supplied the bad blocks list. I fixed that with every drive I got my 
hands on by using a marker to write them onto the drive. But to this day 
I don't understand why the manufacturer didn't do that...

Same for the first IDE drives during the time when the BIOS didn't have 
the autoconfigure options.


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Received on 2014-07-23 15:02:00

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