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by iam-TJ 1323 days ago
"don't set up MDRAID array for ESP, just have the ESP mirrored on all disks. "

Isn't that the entire point of utilising MD RAID-1 in the first place?

I've done as you suggest in years gone by with either metadata v0.9 or v1.0 (not v1.1 or v1.2) where the metadata is not at the start of the block device and therefore does not confuse a non-MDRAID-aware firmware or other OS.
1 comments
effie 1323 days ago
> I've done as you suggest in years gone by with either metadata v0.9 or v1.0

Then why did you wrote

> it is not possible to make it part of a software RAID device

You are saying it is both not possible and that you've done it.

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iam-TJ 1322 days ago
It is NOT possible to have the UEFI access the RAID device so that if one of the mirrors is broken it can continue to boot in degraded mode.

It requires manual intervention of a knowledgable person to boot a UEFI system into the default OS if the ESP is broken or missing.

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effie 1322 days ago
OK now I get what you mean. In that case, one can reboot and select the other non-broken disk and the system will boot, with some hiccups due to degraded array, but it will boot.
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