[HECnet] installing LPs on RSX

On 2015-04-28 01:41, Lee Gleason wrote: Lee, the tapes are corrupted in a much more sophisticated way. All tape blocks are there. However, occasionally, they have been reordered. Assume you have all tape blocks numbered consecutively, including tape marks, which looks like zero length blocks. In a corrupted tape, you might then see the blocks in the following order: 1,2,4,5,6,3,7,8,9,... When a reordering happens, the number of blocks later the "correct" block appears seems to be anywhere from 1 to 4 blocks ahead. I have not been able to spot any patterns to when a block reordering have happened, and I have not been able to spot any pattern to how many blocks later the reordered block appears. My only guess is that when Tim Shoppa did the original dumps he used a program that read multiple blocks in one operation. When a read error occurred, the program noted, and went back and re-read the bad block. However, the original read read multiple blocks and the ones following the read error still got read, and put in the buffer, causing the reorder to happen. But that is just my guess. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol