On 2. Februar 2014 22:39:31 MEZ, Francis Moreau [off-list ref] wrote:

Hi Martin,

On 02/01/2014 11:04 PM, Martin Wilck wrote:

quoted

Hi Francis,

quoted

For Fake RAID, I'm not sure but I would say that the bios is able to
read the RAID metadata as well.
For (md) Soft RAID, I don't know. I would say that the bios is
unlikely to understand the md metadata stored in the /boot partition
so it won't work.

there is no big difference between EFI and legacy systems in this

area.

Well  the main difference I can see is that EFI firmwares access a
filesystem where as BIOS doesn't in order to load  the bootloader.

The EFI BIOS needs a driver to access the RAID array. But so does the legacy BIOS for accessing the MBR.

If you really want to do RAID on partitions, you can put your md-capable EFI boot loader on the EFI system partition. It will work just like in the legacy case. The UEFI partition itself  is of course non-uRAID in this setup, but the same holds for your legacy MBR.

Martin

In the case of BIOS you can still rely on a bootloader such as grub to
access a partition with MD RAID on it.

Thanks

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