DOS ain't dead - Current FreeDOS fdisk utility

Current FreeDOS fdisk utility (Users)

posted by Japheth , Germany (South), 29.01.2021, 06:37
(edited by Japheth on 29.01.2021, 07:35)

> screenshots and dump of boot sector would be a start.

The infos displayed by fdisk don't come from the boot sector.
Here are the partition tables:
BI Type Start-C/H/S End-C/H/S Sector Size MB ------------------------------------------------------------------------------- 00 83 Linux ext2fs 0/ 32/33 1023/254/63 2048 204800000 100000 00 82 Linux Swap 1023/254/63 1023/254/63 204802048 16777216 8192 00 0c Prim. DOS,FAT32,LBA 1023/254/63 1023/254/63 221579264 16777216 8192 BI Type Start-C/H/S End-C/H/S Sector Size MB ------------------------------------------------------------------------------- 80 0c Prim. DOS,FAT32,LBA 0/ 0/ 1 1006/254/63 2048 65536000 32000 00 83 Linux ext2fs 1007/ 0/ 1 63/254/63 65538048 67108864 32768

For disk 2, fdisk displays as disk label "ve partitio", and that's exactly the string at offset 0x47 (decimal 71) of sector 0 (the grub modified MBR, the full string there is "no active partition found").

So fdisk translates the Start-CHS (0/0/1) into a LBA and reads this sector. That's wrong for both FAT32 partitions on Disk 1 and 2.

---
MS-DOS forever!

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Complete thread:

Current FreeDOS fdisk utility - Japheth, 01.01.2021, 20:51
- Current FreeDOS fdisk utility - RayeR, 01.01.2021, 23:45
  - Current FreeDOS fdisk utility - Japheth, 02.01.2021, 02:54
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        Current FreeDOS fdisk utility - rr, 02.01.2021, 12:44
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        Current FreeDOS fdisk utility - Japheth, 06.01.2021, 11:03
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        Forum monospaced font bug - ecm, 06.01.2021, 16:54
        Current FreeDOS fdisk utility - Japheth, 06.01.2021, 17:14
        Current FreeDOS fdisk utility - rr, 07.01.2021, 23:49
        Current FreeDOS fdisk utility - ecm, 08.01.2021, 00:04
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- Current FreeDOS fdisk utility - rr, 02.01.2021, 12:50
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- Current FreeDOS fdisk utility - Japheth, 02.01.2021, 15:39
- Current FreeDOS fdisk utility - marcov, 02.01.2021, 16:56
- Bug confirmed - Japheth, 03.01.2021, 11:16
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    - Bug confirmed - Japheth, 03.01.2021, 20:40
  - Bug confirmed - tom, 06.01.2021, 17:31
    - Bug confirmed - Japheth, 06.01.2021, 18:16
      - Bug confirmed - RayeR, 16.01.2021, 05:14
        Bug confirmed - tom, 16.01.2021, 12:01
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- Current FreeDOS fdisk utility - tom, 10.01.2021, 19:10
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    - Current FreeDOS fdisk utility - mceric, 11.01.2021, 14:16
      - Current FreeDOS fdisk utility - tom, 11.01.2021, 20:11
        Current FreeDOS fdisk utility - Ringding, 13.01.2021, 12:09
    - Current FreeDOS fdisk utility - rr, 11.01.2021, 18:12
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        Current FreeDOS fdisk utility - tom, 26.01.2021, 18:46
        Current FreeDOS fdisk utility - Japheth, 28.01.2021, 22:21
        Current FreeDOS fdisk utility - tom, 28.01.2021, 22:35
        Current FreeDOS fdisk utility - RayeR, 29.01.2021, 00:58
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        Current FreeDOS fdisk utility - rr, 31.01.2021, 12:07
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        Current FreeDOS fdisk utility - tom, 01.02.2021, 13:53
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