[Coco] Burke & Burke Hard Disk controller

[tonym]

Over the years, I have found the Mitsubishi MR535 42MB MFM drives to be the most reliable, hence my stash of about a dozen or so.

They quite frequently show up on eBay, and I have NEVER gotten one that does not work, even when sold as "untested, sold as-s."

This relates to both my CP/M machines (Kaypro 10s, Altos 5 and 580 series) as well as the CoCo with the B&B interfaces.

But, that's just my two cents - my Seacrates I think have all given up the ghost, for the most part.
Only a handful of ST251-1's (-1 is the 42ms version) have actually survived and still work somewhat, along with a couple of ST4096s, but those are physically huge, FH 5.25" monsters.

Tony


---- Original Message ----
From: "Steven Hirsch" <snhirsch at gmail.com>
Sent: 11/21/2014 7:42:53 AM
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Subject: Re: [Coco] Burke & Burke Hard Disk controller

On Thu, 20 Nov 2014, Kandur wrote:

> Are these all the same product?
> How is the price sound?
> http://tinyurl.com/mmcjf3t
> inside view,
> http://tinyurl.com/q4rbe44
> in Cocopedia,
> http://tinyurl.com/llsouxu

Not all of them had the RTC populated.  Is that second picture from the 
auction or elsewhere?  Wherever it came from, I get a kick out of the 
Sovtek 7400 chips ("Made in USSR").

As others point out, MFM drives are rare, expensive when you can find them 
and prone to dropping dead - sometimes even while idle.



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