> -----Original Message----- > From: Zane Healy via cctalk <cctalk@classiccmp.org> > Sent: Wednesday, March 8, 2023 4:35 AM > To: General Discussion: On-Topic and Off-Topic Posts <cctalk@classiccmp.org> > Cc: Zane Healy <heal...@avanthar.com> > Subject: [cctalk] Re: Age of Tape Formats? > > On Mar 7, 2023, at 5:32 PM, Paul Koning via cctalk <cctalk@classiccmp.org> > wrote: > > > > I'm a bit puzzled by "6250 700'" because the reel size has no bearing on the > format. 10 inch reels (1200 feet) were by far the most common but > occasionallly the smaller 600 foot ones would be seen. and in rare cases (the > infamous DEC TS05 comes to mind) 600' was all that they could handle. > > I’ll be the first to admit my question is a bit strange. Basically I’m > trying to use > the date that various media types were first introduced to show the oldest > possible date for a bunch of media I’m trying to date. The 9-Track tapes have > been inventoried as “700 6250 BPI”, and I know they’re the smaller reels. > Doing > some digging, it looks like 6250BPI tapes date back at least as far as 1971 > with > the IBM 3400 series drives, I’d thought that 6250 came about in the 80’s. > > Zane >
Our Honeywell H3200 had 1200BPI NRZI 7-track drives..... http://www.bitsavers.org/pdf/honeywell/datapro/70C-480-01_7404_Honeywell_200_2000.pdf page 13 onwards... Needed chrome tape.... Dave
