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This is going to be ugly. I did the same thing on a reel-to-reel tape in 1986, and I got it back. Here's what I did at the time. All save restore media was 32760 bytes long. I believe 3570 is 262144, but I could be wrong. 1. I took the tape to a 370 architecture, and with the help of someone who knew 370 overwrote the header with a 370 program called DITTO. 2. I built an empty PF from DDS with four fields A (8000 bytes), B (8000 bytes), C (8000 bytes) and D (8760 bytes). At that time, the limiting factor for processing file in RPG was 9999 bytes. 3. I built four LFs over the file, one field each. 4. I wrote an RPG program: File A - Input Primary File B - Chained File C - Chained File D - Chained. In those days there was no notion of either compression or compaction, you likely have both. One of the hardest things was determining where the data started on the tape, and as I remember, there was a "null record" immediately processing the first real data record, about 40K bytes into the tape. Good luck, Al - on the way to Rochester Al Barsa, Jr. Barsa Consulting Group, LLC 400>390 914-251-1234 914-251-9406 fax http://www.barsaconsulting.com http://www.taatool.com "Newman, Dave (TIAS US)" <DNew@xxxxxxxxxxx To om> "'midrange-l@xxxxxxxxxxxx'" Sent by: <midrange-l@xxxxxxxxxxxx> midrange-l-bounce cc s@xxxxxxxxxxxx Subject FW: Recovering data from 02/02/2004 10:22 initialized tape AM Please respond to Midrange Systems Technical Discussion <midrange-l@midra nge.com> > Well, > > This is my first message to this list and unfortunately is under rather > unpleasant circumstances. I have managed to initialize a tape with approx > 1 years worth of valuable data. It is a 3570 tape that was initialized. > I am not an as/400 ops person by any stretch of the imagination but I do > take care of backups/restores among a couple of other jobs. I am being > told that the type of initialize that we do only deletes the header and > technically the rest of the data is still on the tape. I did some google > searches and found something about "bypass label processing" but can't > find enough detail to know if it would help me or not? I have also read > about services that will rebuild headers to recover the data, but no links > or numbers to this type of service. > > Thanks in advance for any info or help that you can provide....this is not > good... :( > > David Newman > Ph: (586) 427-3744 _______________________________________________ This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list To post a message email: MIDRANGE-L@xxxxxxxxxxxx To subscribe, unsubscribe, or change list options, visit: http://lists.midrange.com/mailman/listinfo/midrange-l or email: MIDRANGE-L-request@xxxxxxxxxxxx Before posting, please take a moment to review the archives at http://archive.midrange.com/midrange-l.
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