News for hackers. Stuff that matters.

A comment on Linux Boot Partitions. Parent comment

Re:Linux Boot Partitions by iam-TJ on Friday November 04, 2022 @01:33PM (#33470601)
"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.

[ Parent | on HN ]
Re:Linux Boot Partitions by effie on Friday November 04, 2022 @02:06PM (#33471261)
> 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.

[ Parent | on HN ]
Re:Linux Boot Partitions by iam-TJ on Friday November 04, 2022 @03:59PM (#33472910)
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.

[ Parent | on HN ]
Re:Linux Boot Partitions by effie on Friday November 04, 2022 @04:30PM (#33473346)
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.
[ Parent | on HN ]