Re-enabling the Force_Drive_Recheck() after bootsector write fixes the format problem for the uninitialized 720K floppy in a 1.44M drive. However, as this was commented out most probably for a good reason, unconditionally re-enabling this does not look like the best idea. Any proposals?
> Am 24.08.2024 um 22:35 schrieb Bernd Böckmann via Freedos-devel > <freedos-devel@lists.sourceforge.net>: > > Does anyone remember what exactly is this "sharing violation" FORMAT produced > and under what circumstances it occured? > > https://github.com/FDOS/format/blob/9fe81f425f63615587e625701213025a0a08224c/createfs.c#L167-L169 > > My theory is that commenting out this Force_Drive_Recheck() after writing the > bootsector causes some side-effects while formatting floppy disks with BPB > geometry change. > > > >> Am 24.08.2024 um 21:42 schrieb Bernd Böckmann via Freedos-devel >> <freedos-devel@lists.sourceforge.net>: >> >> May it be that the DOS kernel is informed too late about the changed disk >> geometry while formatting? There is a Force_Drive_Recheck() call after the >> Create_File_System(), forcing DOS to rebuild its DDT (FreeDOS) / UDSC (EDR). >> But Create_File_System already fails. Create_File_System seems to use DOS >> absolute disk reads and writes, I guess with 1.44 disk geometry in use on a >> 720K floppy, because it fails on sector 9 (which might be the 10th?). That >> should indeed fail on a 720K? Would at least explain why this works if a >> previously formatted 720K is re-formatted. >> >> >>> Am 24.08.2024 um 15:46 schrieb perditi...@gmail.com: >>> >>> This is something that should work. I will have to look into it and see >>> why it doesn't work. I have a few ideas, but am working this weekend so >>> may be a few days before I can look into it. I'm currently trying to track >>> down an unrelated stack trashing issue in some kernel changes related to >>> floppy drives that seem innocuous. >>> >>> Jeremy >>> >>> On Sat, Aug 24, 2024, 9:24 AM Bernd Böckmann via Freedos-devel >>> <freedos-devel@lists.sourceforge.net> wrote: >>> Hi, >>> >>> I have problems formatting a zero-filled 720K floppy in a 1.44M drive with >>> format 0.91v. I use the following command: >>> >>> format a: /f:720 >>> >>> Is this the right command to do it? Formatting a 720K disk in a 1.44M drive >>> should be possible? I also cannot format a wiped 360K disk in a 1.2M drive. >>> >>> It seems to work if the disk already was formatted, probably because it >>> contains a valid BPB. Does not matter which kernel is used. It fails under >>> both FreeDOS and EDR kernels, albeit at a different code position. >>> >>> The details are at https://github.com/SvarDOS/edrdos/issues/105 >>> >>> Bernd >>> >>> >>> >>> _______________________________________________ >>> Freedos-devel mailing list >>> Freedos-devel@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/freedos-devel >> >> >> >> _______________________________________________ >> Freedos-devel mailing list >> Freedos-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/freedos-devel > > > > _______________________________________________ > Freedos-devel mailing list > Freedos-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-devel _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
