Re: Transferring an existing system from non-RAID disks to RAID1 disks in the same computer

[Wols Lists <antlists@youngman.org.uk>]

On 20/01/2023 21:01, Pascal Hambourg wrote:
> On 20/01/2023 at 21:26, Wol wrote:
>>
>> I think you've just put your finger on it. Multiple EFI partitions is 
>> outside the remit of linux
> 
> I do not subscribe to this point of view. Distributions used to handle 
> multiple boot sectors, why could they not handle multiple EFI partitions 
> as well ?

Because that means that distros need to know all about EVERY OTHER 
OPERATING SYSTEM?
> 
>> I really don't think the system manager - be it yast, yum, apt, 
>> whatever - is capable of even trying.
> 
> yum and apt are package managers, not system managers. FWIW, Ubuntu's 
> grub-efi packages can deal with multiple EFI partitions in the same way 
> grub-pc can deal with multiple boot sectors.

???

I don't know who's fault it was, probably Microsoft's, but I gave up 
trying to dual-boot a laptop ...
> 
>> At the end of the day, it's down to the user, and if you can shove a 
>> quick rsync in the initramfs or boot sequence to sync EFIs, then 
>> that's probably the best place. Then it doesn't get missed ...
> 
> No, these are not adequate places. Too early or too late. The right 
> place is when anything is written to the EFI partition.

I would agree with you. But that requires EVERY OS on the computer to 
co-operate. I think you are being - shall we say - optimistic?

Fact: Other systems outside of linux meddle with the EFI. Conclusion: 
modifying linux to sync EFI *at the point of modification* is going to 
fail. Badly.

Cheers,
Wol