[vcf-midatlantic] Drive repairs, was Hard drive art

CT chesapeaketechie at gmail.com
Thu Apr 18 17:05:55 EDT 2019


I have a couple Macintosh external drives that aren't working properly.
Would it be the right venue to bring them to VCF East to the class? Or
should I wait for a repair workshop?

Thanks,
  Eric

On Wed, Apr 17, 2019 at 12:36 PM Dave McGuire via vcf-midatlantic <
vcf-midatlantic at lists.vcfed.org> wrote:

> On 4/17/19 11:46 AM, Jason Perkins via vcf-midatlantic wrote:
> > Another issue we'll run into is servo tracks, and no way to re-create
> them
> > once they fade. With the software / fixtures only available at the
> factory
> > I don't know how we could recreate those tools.
>
>   First you'd need to first determine the exact format of the servo
> tracks.  Keep in mind that they may not be "digital" tracks.  If the
> format cannot be determined from patent info, etc, then the only choice
> might be to temporarily disassemble a functioning drive of the same
> model, identify the servo head (assuming a dedicated head for early
> drives), connect it to a signal processing chain and then digitize it.
>
>   In fact, that's probably something that should be done sooner rather
> than later, for some makes and models of drives that are dropping like
> flies now.
>
>   Then it should be possible to synthesize those waveforms and lay them
> back down on the platter.
>
>   Not easy, of course, but similar things have been done by smart and
> motivated people with, say, QIC tapes. (I'm looking at YOU, AJ!)
>
>             -Dave
>
> --
> Dave McGuire, AK4HZ
> New Kensington, PA
>


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