Another Crazy Idea: disc drive controller swapping
teoz at neo.rr.com
Thu Nov 25 14:28:17 CST 2010
You still see HD controller boards for newer drives for sale on ebay, I
didn't think swapping a board on a newer HD would work.
----- Original Message -----
From: "steve shumaker" <shumaker at att.net>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Thursday, November 25, 2010 3:14 PM
Subject: Re: Another Crazy Idea: disc drive controller swapping
> controller board swapping used to be a "fairly frequent" (interpret that
> at your pleasure) occurrence in the cyber forensic community as a method
> of reviving media taken as evidence. Obviously it is rife with issues and
> some media will cooperate more than others but in general, the older media
> type with less on-board "smarts" will respond fairly well as long as the
> board(or chips if that old) are a good match. in terms of firmware...
> steve shumaker.. former (as in a long time ago) computer crime
> investigator/ forensics specialist
> On 11/25/2010 8:17 AM, Philip Pemberton wrote:
>> Here's another idea that'll get me a place in the Loony Bin.
>> A little while ago I picked up a couple of Amstrad EME232 double-sided
>> 3-inch floppy drives. Out of the three I have, two have had their
>> read-write ASIC zapped by someone (in one case myself, in another an ebay
>> seller) plugging them into a PC power supply to "test". Net result: the
>> ASIC goes completely deaf.
>> Let's assume for a minute that the heads in the EME232 drives are
>> undamaged. That means all the issues are related to defective circuitry
>> on the PCB. So, how about this for an idea: move the controller chip and
>> surrounding circuitry (or even the whole board) to the EME232, then wire
>> it into the existing drive mechanics.
>> This would -- in theory -- allow the two dead 232s (and possibly the
>> EME156 single-head drive) to be resurrected.
>> Anyone care to comment on this idea and its possibility or absurdity?
>> The other option would be to get a new read-write ASIC for the Amstrad
>> drives, but those seem to be like hen's teeth. Part number is M51017AP
>> (made by Panasonic but if memory serves they're not marked with a logo or
>> manufacturer designation) if anyone wants to check.. :)
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