Re: grub-mkrescue: Problem with MBR partition table at start of EFI partition

2019-05-11 Thread Michael Schierl
[Please cc: me since I am not subscribed to that list] Hello, I know this is getting off-topic, but since I am surprised how many people here (have to) base their knowledge of booting Windows install media from rumors and "advertising", I decided to bring in my knowledge and personal experience

Re: grub-mkrescue: Problem with MBR partition table at start of EFI partition

2019-05-11 Thread Thomas Schmitt
Hi, Florian Pelz wrote: > I guess this is off-topic and we cannot learn anything about the > permissibility of mformat -k from Windows? Yes. The on-topic conclusion so far is that i cowardly propose to zeroize the MBR partition table in the mformat result before populating it by mcopy. (Code sni

Re: grub-mkrescue: Problem with MBR partition table at start of EFI partition

2019-05-11 Thread Thomas Schmitt
Hi, > On the other hand, in the Windows world this rarely causes any confusion > since no Windows version I've encountered so far contains native tools > to write an ISO (or any other image file) to a USB stick as Unix' "dd" > command would. A Wallace Line for ISO-zooa. This explains a lot. > t

Re: grub-mkrescue: Problem with MBR partition table at start of EFI partition

2019-05-11 Thread pelzflorian (Florian Pelz)
I guess this is off-topic and we cannot learn anything about the permissibility of mformat -k from Windows? Michael Schierl already explained everything, but still: I reinstate the Windows 10 USB installation medium’s content. On Sat, May 11, 2019 at 07:31:23PM +0200, Thomas Schmitt wrote: > > I

Re: [PATCH requesting feedback] resuce: allow disabling of the grub resuce shell

2019-05-11 Thread andreas
On 13:30 10.05.19, Daniel Kiper wrote: > I am OK with the idea but the patch requires polishing and maybe splitting > into two or more. And certainly it is not a release material. Thanks for the feedback. Do you have some specific points that you would like to see addressed? I certainly want the m

Re: grub-mkrescue: Problem with MBR partition table at start of EFI partition

2019-05-11 Thread Thomas Schmitt
Hi, Florian Pelz wrote: > Shall I continue testing? I'm into ISO images. But it might be interesting to see what Microsoft deems to be bootable and is willing to promote by its weight. > I do not know how to verify on Windows if the boot used UEFI. You could zeroize the x86 machine code in the

Re: grub-mkrescue: Problem with MBR partition table at start of EFI partition

2019-05-11 Thread pelzflorian (Florian Pelz)
On Sat, May 11, 2019 at 02:05:25PM +0200, Thomas Schmitt wrote: > > I will continue testing the Windows 10 USB install medium: > > /dev/sdb1 * 2048 15728639 15726592 7.5G c W95 FAT32 (LBA) > > That's not an EFI System Partition. > So i assume the USB stick boots by BIOS and x86 machine code

Re: Debian Installer GRUB test image available

2019-05-11 Thread John Ogness
On 2019-05-11, John Paul Adrian Glaubitz wrote: >>> If you find some time, I think it would be interesting if we had a >>> grub-boot test image where BootX is using: >>> >>> >>> boot &device;:,\System\Library\CoreServices\grub.elf >>> >>> >>> I suspect Apple users would then be able to "properly

Re: grub-mkrescue: Problem with MBR partition table at start of EFI partition

2019-05-11 Thread Thomas Schmitt
Hi, > The Windows 8.1 ISO image that I downloaded from Microsoft yesterday > also cannot be booted from a USB drive on neither this Macbook or > another computer. I wonder how other people can get to the impression that their attempts succeeded. (Will have to wait for somebody who is willing to g

Re: grub-mkrescue: Problem with MBR partition table at start of EFI partition

2019-05-11 Thread pelzflorian (Florian Pelz)
On Fri, May 10, 2019 at 06:27:17PM +0200, Thomas Schmitt wrote: > Hi, > > Florian Pelz wrote: > > This is not an install ISO but a USB install medium. The USB drive > > was written by the Windows Media Creation Tool. Copying instead a > > Windows ISO created by the Windows Media Creation Tool to