Hi Francis, > 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. Native MD meta data isn't understood by any BIOS I've heard of. (Well I guess you actually could try to port mdadm to the UEFI environment and use it for booting - under UEFI it is possible to run your own applications, in principle at least, unlike legacy BIOS). DDF or IMSM meta data can be read and written by BIOS fake RAID under uEFI just as well as in legacy mode. You just need to make sure that your system vendor delivers a BIOS with all the required uEFI tools. > If so does that mean I can't mirror /boot partition on EFI systems ? > Maybe creating a RAID device using the whole disk (not the partition > device) would work ? Mirroring he whole disk is the only thing the BIOS can possibly do. But chances are bad that it will work with MD metadata, see above. Martin -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
