Nevermind--I found a label that identifies them as 7094 tapes.
Thanks, all.
--Chuck
On 10/10/2017 04:24 PM, Paul Koning via cctalk wrote:
> CDC end of record or end of file marks are not tape marks. They are data
> blocks (very short ones).
Indeed. A file mark is 17 octal with even parity, regardless of the
data parity (odd in this case). The puzzling thing is the 00 octal
> On Oct 10, 2017, at 6:43 PM, Charles Anthony via cctalk
> wrote:
>
> On Tue, Oct 10, 2017 at 3:29 PM, Chuck Guzis via cctalk <
> cctalk@classiccmp.org> wrote:
>
>> Gang;
>>
>> I'm running some old (>50 years) 7 track tapes and I've come across an
>> oddball tapemark.
On Tue, Oct 10, 2017 at 3:29 PM, Chuck Guzis via cctalk <
cctalk@classiccmp.org> wrote:
> Gang;
>
> I'm running some old (>50 years) 7 track tapes and I've come across an
> oddball tapemark. Instead of 17 octal with a 17 LRCC and even parity,
> I"m getting 17 00 17 - and the 00 is in the
Gang;
I'm running some old (>50 years) 7 track tapes and I've come across an
oddball tapemark. Instead of 17 octal with a 17 LRCC and even parity,
I"m getting 17 00 17 - and the 00 is in the correct (for the tape, odd)
parity.
I don't know what system wrote this. Does this ring any bells