Keatah Posted September 30, 2020 Share Posted September 30, 2020 What's the name of that utility that can change a disk's volume number? Without losing data or reformatting. I know of course a disk can be created via INIT HELLO ,S6,D1,V195 for example, but how about changing a disk's existing volume number? Quote Link to comment Share on other sites More sharing options...
Iamgroot Posted October 1, 2020 Share Posted October 1, 2020 (edited) A sector editor will do if you know which byte in the VTOC to change. But if you know that much about the VTOC, then it shouldn't be that hard to read a sector into memory (specifically Track 17 Sector 0), change the byte and write it back using a short applesoft program. Edited October 1, 2020 by Iamgroot Quote Link to comment Share on other sites More sharing options...
Keatah Posted October 1, 2020 Author Share Posted October 1, 2020 (edited) It's a little more than just changing the volume number in the VTOC. The volume # is also stored in each track like so. D5 AA 96 volume/track/sector/checksum DE AA EB. And there was a program that could redo the entire track(s) with information you specify while leaving the user data alone. Edited October 1, 2020 by Keatah Quote Link to comment Share on other sites More sharing options...
bolserst Posted February 28, 2021 Share Posted February 28, 2021 (edited) On 10/1/2020 at 5:56 AM, Keatah said: It's a little more than just changing the volume number in the VTOC. The volume # is also stored in each track like so. D5 AA 96 volume/track/sector/checksum DE AA EB. And there was a program that could redo the entire track(s) with information you specify while leaving the user data alone. Not sure if this is the program you were thinking of, but I recently used "INIT" from the "Bag of Tricks" disk to correct volume # on and Einstein Compiler disk to 232 so it would run. You can change initialization uniquely on a track by track basis and has an option to preserve the existing data. Another thing I played with was changing the sector skew factor from default of 02 descending to 09 descending as recommended in the in the Bag of Trick manual. It does indeed cut disk load times of large binary and Applesoft files nearly in half. Edited February 28, 2021 by bolserst 1 Quote Link to comment Share on other sites More sharing options...
Keatah Posted February 28, 2021 Author Share Posted February 28, 2021 (edited) That's it! I knew it all along! Edited February 28, 2021 by Keatah Quote Link to comment Share on other sites More sharing options...
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