Vintage hard disks

PCAT

I've begun to collect MFM hard disks for the heck of it - but some brand names have surfaced that I can't find much (if any) data on.

In particular, Cogito and Tulin.

I've got a Cogito CG906 / CG912 coming in the mail, but I can't find any information other than the CHS parameters and the eBay listing I bought it from.

Any help?

A useful reference for CHS parameters:
http://www.shostatsky.narod.ru/rem_comp/ohdspec.html

BigCJ

They sound obscure. All I could find were eBay listings for very small drives and a Wikipedia article listing hard disk makers who've gone out of business. Cogito and Tulin were both there.

SomeGuy

If I had more money, I'd grab some more MFM hard drives myself.

I know I have heard of Tulin, but I don't recall anything about them. What kind of information are you looking for?

Unfortunately, things like schematics weren't usually available.

The other day I noticed this large list of defunct hard drive manufacturers on wikipedia: https://en.wikipedia.org/wiki/List_of_d ... ufacturers

Kind of an interesting and depressing read.

You can probably find a little more information by searching Google Books, but probably not much besides old pricing.

PCAT

SomeGuy wrote:

If I had more money, I'd grab some more MFM hard drives myself.

I know I have heard of Tulin, but I don't recall anything about them. What kind of information are you looking for?

Unfortunately, things like schematics weren't usually available.

The other day I noticed this large list of defunct hard drive manufacturers on wikipedia: https://en.wikipedia.org/wiki/List_of_d ... ufacturers

Kind of an interesting and depressing read.

You can probably find a little more information by searching Google Books, but probably not much besides old pricing.

Just where to find drives cheap, maybe some way to get DOS to install on a disk with a lot of bad tracks (Kalok Octagon KL320 with 532 bad tracks)?
Manuals and CHS parameters would be nice as well, and maybe some manuals for my MFM controllers (I could only find the manual for a DTC 5150XL card).

BigCJ wrote:

They sound obscure. All I could find were eBay listings for very small drives and a Wikipedia article listing hard disk makers who've gone out of business. Cogito and Tulin were both there.

That's why I bought the Cogito. I didn't see them on Wikipedia last I checked, so I'll look again.

On the lookout for a CMI disk.

I plan to share the details of these drives either here or on my website. Link below, there's nothing much yet, and it may change servers some time soon, but I'm going to upload the text information right now and put pictures of the disks on there as well.
https://sites.google.com/site/lotsofdisks/

If anyone's got anything to add, I'd be grateful for the information. Suggestions would be nice as well.

02k-guy

PCAT wrote:

SomeGuy wrote:

If I had more money, I'd grab some more MFM hard drives myself.

I know I have heard of Tulin, but I don't recall anything about them. What kind of information are you looking for?

Unfortunately, things like schematics weren't usually available.

The other day I noticed this large list of defunct hard drive manufacturers on wikipedia: https://en.wikipedia.org/wiki/List_of_d ... ufacturers

Kind of an interesting and depressing read.

You can probably find a little more information by searching Google Books, but probably not much besides old pricing.

Just where to find drives cheap, maybe some way to get DOS to install on a disk with a lot of bad tracks (Kalok Octagon KL320 with 532 bad tracks)?
Manuals and CHS parameters would be nice as well, and maybe some manuals for my MFM controllers (I could only find the manual for a DTC 5150XL card).

On the lookout for a CMI disk.

http://www.minuszerodegrees.net/manuals ... 0Guide.pdf

PCAT

02k-guy wrote:

http://www.minuszerodegrees.net/manuals/DTC 5150XL - Installation Guide.pdf

That's the controller card I have. I have two WD cards and a Cirrus Logic card that I can't figure out.

ibmpc5150

I recommend to contact VCF.

http://www.vcfed.org/forum/forumdisplay ... and-Clones

02k-guy

"That's the controller card I have. I have two WD cards and a Cirrus Logic card that I can't figure out."

My bad for misreading what you said.

"I recommend to contact VCF.

http://www.vcfed.org/forum/forumdisplay ... and-Clones"

Nice link. How did I miss tis one before?

PCAT

02k-guy wrote:

My bad for misreading what you said.

It's fine

02k-guy wrote:

Nice link. How did I miss this one before?

Same, no idea how I overlooked it. Usually I'd use Vogons?