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BOOTMGR and new Linux installation (Users)

posted by Laaca Homepage, Czech republic, 24.01.2025, 14:56

> Uhm... According to
> this,
> AA55 at offset 01FEh should denote the end of MBR. That might mean no valid
> partition was found. If I'm reading that correct.
>
> What motherboard is that? Does it have an UEFI BIOS or a legacy BIOS? How
> does your partiton layout looks? Which Slackware version did you install?
> 32bit or 64bit?
Yes, AA55 (or 55AA) at offset 01FEh means end of the MBR.
But besides that it is present (in the same offset) also in volume boot records in FAT ot NTFS formated partitions.
The BOOTMGR code unforunately checks this and does not allow to boot from partitions without the 55AA marker.
So the question is whether is sufficient to modify BOOTMGR to not to check 55AA or if some deeper changes are necesssary.

The question is whether the ext 2/3/4 partitions except the start of code execution from 0.st sector of their partitions (like FAT/NTFS) or from some other sector.
This thing is a even more complicated by existence of LiLo.
During the installation (64bit, version 15.0) I chose that I want to use Lilo and LiLo shall be located inside partition (not in MBR).

---
DOS-u-akbar!

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