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WDe and GPT, booting DOS (Users)

posted by Japheth Homepage, Germany (South), 02.01.2023, 13:04

> In my experience, MS-DOS 7.1 handles 64 kib clusters just fine. 128 sectors
> / cluster is possible and works perfectly well, even for FAT32 drives.
Ok, so it must be something else.

My try:

1. create a "Basic Data Partition", size 720 GB, in Linux using fdisk
2. format the partition with mkfs.fat
3. copy the necessary files to that partition ( IO.SYS, COMMAND.COM, ... )
4. run update-grub, the (newly created) partition is added to the boot menu
5. reboot into DOS ( located on another bootable FAT partition )
6. launch WDe and modify the boot sectors of the 720 GB partition
7. reboot, this time selecting the 720 GB partition

It worked - however:

a). my 720 GB partition still has 64 sectors per cluster
b). had to remove SmartDrv from config.sys - looks like it cannot handle such large FAT32 partitions.

---
MS-DOS forever!

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