Tape Imaging

Paul Koning paulkoning at comcast.net
Fri Aug 12 13:19:40 CDT 2016

> On Aug 12, 2016, at 2:11 PM, Chuck Guzis <cclist at sydex.com> wrote:
> On 08/11/2016 10:50 PM, jim stephens wrote:
>> That sounds like someone just set a Cipher 990 or such to 6240 GCR
>> and overwrote it.  The 1600bpi was residue which was previous tape
>> contents?
> No, that's the odd thing--both files (tar) were complete from beginning
> to end.  The first was a smaller version of the second, but otherwise
> complete.  We'll never know how the thing got that way.

I think some drives can handle mid-tape density changes.  It may even have been done by DEC, though I may be confusing that with the odd case of RSTS distribution tapes which started out with a DOS-11 label and then switched to ANSI labels.


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