Re: Oddball 7-track tapemark?

2017-10-10 Thread Chuck Guzis via cctalk
Nevermind--I found a label that identifies them as 7094 tapes. Thanks, all. --Chuck

Re: Oddball 7-track tapemark?

2017-10-10 Thread Chuck Guzis via cctalk
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

Re: Oddball 7-track tapemark?

2017-10-10 Thread Paul Koning via cctalk
> 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.

Re: Oddball 7-track tapemark?

2017-10-10 Thread Charles Anthony via cctalk
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