[Coco] DYSAN Digital Diagnostic Disk..........

[Gene Heskett]

On Wednesday 20 December 2017 10:25:16 Bill Pierce via Coco wrote:

> It looks like that has the reference disk, which is rare. The
> alignment disk itself is in the archives.
>
And the archive data copy is no good. Those disks are made individually,
each track made on a series of purposely miss-adjusted drives, and to 
copy them from a 'normal' drive to a normal drive destroys the errors 
except for the loss of amplitude the errors cause on a supposedly well 
adjusted drive. Doing the copying from a somewhat maladjusted drive is 
even worse.  So a copy is about as usefull as the appendages on the 
belly of a boar hog when it comes to diagnosing a maladjusted drive.

Since they can't be accurately copied, thats the reason for the to us, 
outrageous price if indeed its a genuine Dyson drive test disk. Thats 
several times the cost from Dyson when Dyson had them for sale. I 
faintly recall a price of around $25 all those yeares ago.

If you really, really need  one, check with whats left of Dyson and see 
if they have any left.  Or pay the ebay price if the seller can certify 
it is an original, money back, no argument if not. And even then you 
take your chances at such as center hole edge damage. That disk may be 
25 years old, and shoved into many many unknown drives, with perhaps 
magnetized heads which could do a partial erasure.

> Bill Pierce
> "Charlie stole the handle, and the train it won't stop going, no way
> to slow down!" - Ian Anderson - Jethro Tull
>
> My Music from the Tandy/Radio Shack Color Computer 2 & 3
> https://sites.google.com/site/dabarnstudio/
> Co-Contributor, Co-Editor for CocoPedia
> http://www.cocopedia.com/wiki/index.php/Main_Page
>
> E-Mail: ooogalapasooo at aol.com
>
>
>
>
>
> -----Original Message-----
> From: Joe Schutts via Coco <coco at maltedmedia.com>
> To: coco <coco at maltedmedia.com>
> Cc: Joe Schutts <j_schutts at yahoo.com>
> Sent: Wed, Dec 20, 2017 7:43 am
> Subject: [Coco] DYSAN Digital Diagnostic Disk..........
>
> Hi Everyone,I came across something today that SOME people might find
> interesting (OR need). A DYSAN Digital Diagnostics disk on sale on
> E-Bay for $100.00 US. I'm sure that there are some of you out there
> that need to re-adjust your Floppy Disk Drives and this would be an
> excellent addition. Who knows, you just might start up a new
> profession fixing disk drives...Anyway, here's the link and good luck
> fixing disk
> drives...www.ebay.ca/itm/VINTAGE-DYSAN-3-1-2-ALIGNMENT-AND-DIAGNOSTIC-
>CE-DISKETTES-/112575319782?hash=item1a36030ee6:g:IlwAAOSwxTlZxuZcJoe...
>| | | | $100.00 |  | | || |  | VINTAGE DYSAN 3 1/2 ALIGNMENT AND
> DIAGNOSTIC CE DISKETTES | eBayVINTAGE DYSAN 3 1/2 ALIGNMENT AND
> DIAGNOSTIC CE DISKETTES | Computers/Tablets & Networking, Vintage
> Computing, V... | | |-- Coco mailing
> listCoco at maltedmedia.comhttps://pairlist5.pair.net/mailman/listinfo/co
>co


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>