paranoie da quarantena

[rage75]

Sarebbe da provare, su nuovo Uefi non ho mai testato la cosa....se vedi sotto:

Change to an MBR style partition table, and Windows will expect to be bootstrapping in the old PC98 way. You'd have to switch on the Compatibility Support Module option in your firmware

e poi dipende da classe a classe di Uefi:

Some firmware [i]might[/i] always use legacy mode if an MBR is detected, but this behavior is not standard

In tempi di Paranoia, un tentativo con la nuova Mobo e creare un disco MBR  piazzando una EFI nel mezzo e avviare in Uefi puro è un test interessante da fare  :039: .

Mi pare che anche su Linux non ci siano certezze:

Linux can certainly boot off an MBR disk in EFI mode. The trouble is that this type of configuration is poorly tested, and you may have problems getting your boot loader registered with the EFI. You might need to name your boot loader EFI/BOOT/bootx64.efi and rely on the EFI using this fallback filename.

Also, most Linux distributions' installation programs won't make it easy to set up this sort of configuration; you may need to install to GPT and convert that to MBR, or install in BIOS mode and then install an EFI boot loader after the fact.

E da quello che leggo neanche loro ci hanno provato, chi si offre volontario?:

Windows (uniquely) requires GPT to use EFI

My understanding is that this is a requirement of the Windows installer, but it's possible to get Windows to boot in EFI mode from an MBR disk by using various tricks, like converting from GPT to MBR after installing the OS, or by replacing a BIOS-mode boot loader with an EFI-mode boot loader without changing the partition table type. That said, my knowledge of precisely how best to achieve this goal is foggy, since I've only read about it; I've never done it myself. I've read about this only once or twice in several years, so this is not something that's done very often.

Can the EFI system partition be a logical partition ?

In theory, it shouldn't matter. In practice, I don't know. Booting in EFI mode from an MBR disk is such a corner case that there's a small but non-negligible chance that literally nobody in the world has tried using an MBR logical partition as an ESP. Certainly I haven't tried it. Please keep this in mind if you decide to pursue booting in EFI mode from an MBR disk -- your odds of getting expert (or even advanced amateur) help drop to near zero should you run into problems.

Overall, my recommendation is to look into MBR-to-GPT conversion tools. Chances are you'll be able to convert from MBR to GPT without trouble. The result will be less likely to cause problems than trying to boot in EFI mode from an MBR disk. You should, however, back up before doing this. That would be my advice even without an MBR-to-GPT conversion in the picture, though; mucking with boot loaders can be as risky as mucking with partition tables, so trying that without a backup is inadvisable, too.

fonte: https://superuser.com/questions/739153/u...tion-table