Discussion of large systems (cctech Digest, Vol 39, Issue 11 9/11/2006) - test-drb@ccmp.vtda.org

9 Nov 2006

Al Kossow <aek at bitsavers.org> wrote:

On 8 Nov, 2006, at 19:38, cctech-request at classiccmp.org wrote:

...

 If you are interested, I could probably get you one of these when  
 they're
 available

 http://bitsavers.org/tools/wizl/tapewizl/

 Paul Pierce built something similar to what you did for recovering  
 7-track
 data, and discovered that you really need to recover the data using  
 analog
 techniques to get any reliability.

 http://www.piercefuller.com/collect/proj.html

Thanks for the offer. I will see how we get on using the original  
hardware
first. The decks have ten tracks so I guess I would need two of them.  
Each
frame contains 4 bits of data and six error correction bits so I am  
hopeful
that the original hardware, after recalibration etc, will be able to  
read almost
all of the data, and where we can't, at least know which frames have  
errors in them.