Re: md extension to support booting from raid whole disks.

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On Fri, May 1, 2009 at 2:04 PM, Goswin von Brederlow <goswin-v-b@xxxxxx> wrote:
> And is horribly ugly when you have to switch hardware. And try doing
> it with disks from different controlers? What bios supports that?

This is just a simple trade-off between two options.

1/ If you want to reliably boot from multiple disks then make a native
md-raid1 array for /boot like hpa suggests.
2/ If you do not want to make /boot into an md-raid1, and you still
want to boot from raid5, then use $VENDOR's raid5 option-rom and
mdadm's external metadata support.

There is no third option with native md-raid5 and grub2 because as
Gabor and hpa point out it is not reliable and will break.

> What bios even supports raid5?

Just look for any off-the-shelf motherboard that says it has onboard
raid5 support and is not using a dedicated hardware raid controller.

Regards,
Dan
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