make partition bootable

[ghezibde]

When i create a new usb key with sudo ./multios-usb.sh -f ext4 sdc
sd?1 EFI System partition is not bootable
Making in bootable make usb key usable.
Couldn't ./multios-usb.sh make it bootable automatically ?
Thanks

[JonnyTech]

sudo ./multios-usb.sh -f ext4 sdc sd?1

The correct syntax is:

sudo ./multios-usb -f ext4 /dev/sdc

The device will be bootable in both mbr and gpt mode.

[Mexit]

EFI System partition is not bootable

The EFI partition does not need to be bootable – there is no such thing in EFI.
Do you start your computer in BIOS or EFI?

[ghezibde]

I'm preparing debian distributions massive install workshops of individual computer in the months to come.
I was using several ventoy usb keys; i decided i would no longer use ventoy and switch to MultiOS-USB.
Today i prepared 3 usb keys, 2 mbr and one GPT.

Finally, they seem to be bootable as is.
I couldn't boot with the one i prepared this morning, i'll have to look at it.
Thanks for the beautiful tool, i'll advice the move i 'm doing to others, i just publish a post about it on mastodon for french speaking people, post to come for english speaking people.

[ghezibde]

I confirm i could not boot from FAT32 usb key on a non UEFI computer (here an HP 6734b) (i just had to enable "boot" flag on the usb "EFI System" partition to make it work don't ask me why ?)

Booting on an Ext4 formatted key work straight on on the same computer (i only use Linux ISOs)

I did not meet any problem on more recent computers.