On 21/01/2023 at 20:08, Reindl Harald wrote:

Am 21.01.23 um 19:57 schrieb Pascal Hambourg:

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Am 21.01.23 um 19:32 schrieb Pascal Hambourg:

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On 21/01/2023 at 16:21, Wols Lists wrote:

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Is that one EFI per OS, or multiple identical EFI? :-)

Neither. Multiple possibly not identical EFI partitions

how is that related to RAID at all?

RAID provides redundancy while the system is running. For boot 
redundancy, the boot loader must be installed on each disk. With EFI 
boot, it means there must be an EFI partition on each disk. But EFI 
partitions do not need to be identical as long as any of them can boot 
the system.