Whence 556?

[P Gebhardt]

Hi all,

thanks, Chuck, for pointing to my website with the 604 drive, but 
it's currently offline as I am required to update the disclaimer part.
This is required, since in Europe,a new law for data protection was 
introduced on Friday, 25th of May. 
I plan to put the website back online this weekend.

All the best,
Pierre

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Pierre's collection of classic computers moved to: http://www.digitalheritage.de






Am Montag, 4. Juni 2018, 23:15:10 MESZ hat Chuck Guzis via cctalk <cctalk at classiccmp.org> Folgendes geschrieben: 





On 06/04/2018 11:20 AM, Rich Alderson via cctalk wrote:


> For decades, I remembered the lowest density for magnetic tapes as 225 bits/in,
> not 200.  I have never been able to find the number "225" in any manual since
> starting the project which became the museum 15 years ago (sob!), but it still
> hangs around in my mind and pings whenever I see "200BPI" mentioned.


Nope.  I've seen 248 mentioned and I have period-specific tapes that are
declared to be 200 bpi on the label and then there's this:

http://www.digitalheritage.de/peripherals/cdc/604/604.htm

Note the density indicators on this panel from a CDC 604.

--Chuck