DOS ain't dead

Bug in FreeDOS FDISK 1.3.4 or BIOS? (Developers)

posted by Japheth , Germany (South), 21.11.2022, 08:10

> Diagnosis with WDE showed that in the process of editing via FDISK the end
> cylinder of the partition increased by one. At first it was CHS 260/254/63,
> after editing (adding a 8000MB extended partition) it was CHS 261/254/63
> but LBA sector count remained the same.

Ok. I guess that FD Fdisk, when the Extended Partition is created, tries to set the start at a cylinder boundary AND want the starting sector number not to be "odd". To avoid "holes", it adjusts the upper limit of the partition that's located just before the newly created one.

Since the BPB is not affected and the upper limit is not decreased, there's not really any problem.

Adjusting the LBA values would probably be good, but the primary partition type is 0B ( FAT32 CHS ), so the LBA values are - correct me if I'm wrong - "informational" only.

---
MS-DOS forever!

Complete thread:

• Bug in FreeDOS FDISK 1.3.4 or BIOS? - boeckmann, 20.11.2022, 19:09
  • Bug in FreeDOS FDISK 1.3.4 or BIOS? - Japheth, 21.11.2022, 08:10
    • Bug in FreeDOS FDISK 1.3.4 or BIOS? - boeckmann, 21.11.2022, 11:21
      • Bug in FreeDOS FDISK 1.3.4 or BIOS? - Laaca, 21.11.2022, 18:21
        • Bug in FreeDOS FDISK 1.3.4 or BIOS? - fritz.mueller, 22.11.2022, 12:06
          • Bug in FreeDOS FDISK 1.3.4 or BIOS? - boeckmann, 23.11.2022, 14:36
            • Bug in FreeDOS FDISK 1.3.4 or BIOS? - tom, 23.11.2022, 16:22
              • Bug in FreeDOS FDISK 1.3.4 or BIOS? - boeckmann, 23.11.2022, 20:23
  • Bug in FreeDOS FDISK 1.3.4 or BIOS? - glennmcc, 23.11.2022, 19:55
    • Bug in FreeDOS FDISK 1.3.4 or BIOS? - boeckmann, 23.11.2022, 20:17
    • Bug in FreeDOS FDISK 1.3.4 or BIOS? - boeckmann, 23.11.2022, 20:52
      • Bug in FreeDOS FDISK 1.3.4 or BIOS? - boeckmann, 24.11.2022, 15:38
        • Bug in FreeDOS FDISK 1.3.4 or BIOS? - fritz.mueller, 24.11.2022, 18:47