parttool cannot set partition type of a type 0 MBR partition

[steve6375]

[a1ive]

Yes. because hd0,2 is not a valid partition if type is 0x00. I'm thinking about how to solve it. Do you have any idea? maybe we could let grub2 'recognize' type 0x00 partition?

[steve6375]

maybe we could let grub2 'recognize' type 0x00 partition?

I think that would be a bad idea. It may break compatability.

if partition has valid MBR (ends 55 AA) maybe use --force command

parttool (hd0,2) type=0xEF --force

Then it uses dd to write byte?

[a1ive]

parttool module is very complex, needs to be rewritten. dd is a simple workaround.

[steve6375]

Cant you just test for --force and run separate code to just change the one byte? If not, I will have to use dd.

[a1ive]

grubfmx64.efi.tar.gz

I modified partnew command. usage: partnew --type=0x00 hd0 4 (without --start --length --file options) USE WITH CAUTION!

[steve6375]

so I can use type=0x00 to set default type or --type=0xEF to set specific type and it will not change other values in the partition table?

[a1ive]

yes. only change part type (and active flag if with --active).

[steve6375]

Not detecting type ??

[a1ive]

so I can use type=0x00 to set default type

sorry, no auto-detection for 0x00 or 0x10

[steve6375]

So auto-detect for type 0 only works when file or start length params used?

[a1ive]

yes.

[steve6375]

OK - seems to work. 👍 Can help for partnew be updated?

written?