> On May 24, 2018, at 8:49 PM, Paul Gilmartin > <0000000433f07816-dmarc-requ...@listserv.ua.edu> wrote: > > On Thu, 24 May 2018 20:03:55 -0500, Edward Gould wrote: >> >> Our big boss was trying to show the board how he tried to save money. They >> sort of forced him into getting STC (now STK) tape drives. All of a sudden >> some of our jobs were getting S237 (block count did not match trailers), STC >> said we had bum tapes, we went through all sort of shenanigans to prove they >> weren’t. I had to write a program that counted blocks and compare it the >> tapes count. The entire mess ended up with STC getting kicked out and IBM >> drives were brought back in. Of course never a S237 with a IBM drive. Our >> tape library while not super large it was large and finally management >> finally figured it out in order to get good people you had to hire/pay for >> them. >> > You couldn't just discard the tape if the data were precious. Of course not they at least checked in TMS to see. > > Just curious: did it write blocks and not count them or count blocks and not > write them? > (Full disclosure: I may have been a StorageTek (AKA STC, AKA STK) employee > around > that time.) It seemed *NOT* to write the block. and that is what scared us the most how much data did we loose. I wasn’t privy into the investigation (but I guess it caused quite a uproar in upper echelons) People were assigned to find out how much data was lost. We did not work with any money it was just data to us. Luckily (I guess) none of the tapes contained any master data (we had a huge database of everybody in the country that subscribed to our magazines and books, records(CD'sl), etc . This was “our treasure”. This was 30++ years ago and I do not remember the Number of tapes (6250) that contained the maser file but it was probably in the 60’s. > > I once read a tape, all CDC equipment; no IBM nor StorageTek and discovered > an entire block missing with no error reported. I visually inspected the > first few > meters of the tape and noticed a transverse crease. I assume that wafted > exactly one block over the read heads. Score -1 for NRZI. > > -- gil > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
