On 25/06/2022 18:53, Alexander Shenkin wrote:

On 6/25/2022 10:43 AM, Wols Lists wrote:

quoted

On 25/06/2022 18:38, Alexander Shenkin wrote:

quoted

On 6/25/2022 10:10 AM, Wols Lists wrote:

quoted

On 25/06/2022 14:35, Stephan wrote:

quoted

Pascal Hambourg [off-list ref] writes:

quoted

Why 0.90 ? It is obsolete. If you need RAID metadata at the end of
RAID members for whatever ugly reason, you can use metadata 1.0
instead.

Does mdraid with metadata 1 work on the root filesystem w/o initramfs?

If you're using v1.0, then you could boot off of one of the mirror 
members no problem.

You would point the kernel boot line at sda1 say (if that's part of 
your mirror). IFF that is mounted read-only for boot, then that's 
not a problem.

Your fstab would then mount /dev/md0 as root read-write, and you're 
good to go ...

Cheers,
Wol

My metadata is 1.2... I presume that won't cause problems...

Do you need an initramfs to assemble raid ... I thought you did ... in 
which case your system will not boot without one if your root is v1.2 ...

Cheers,
Wol

I have no idea.  My system boots fine now.  Will any of this impact 
booting after the switch to a new CPU + motherboard?

If it's the same setup, it shouldn't make any difference. Famous last 
words ...

Cheers,
Wol