Michael Hampicke <m...@hadt.biz> wrote: >Am 20.10.2013 15:13, schrieb Mick: >> On Sunday 20 Oct 2013 13:57:34 Michael Hampicke wrote: >>> Am 20.10.2013 11:54, schrieb Mick: >>>> Any ideas why the Ubuntu installation won't boot? >>> >>> My guess would be, you cannot boot, because if you install grub in >>> /dev/md0. >>> >>> Upon boot the bios cannot find stage1 of the bootloader, which >normally >>> lies in the MBR (which also houses the partition table). >> >> I see ... so installing the MBR code in the /dev/md0 block device is >further >> down the disk than where BIOS is looking for it and that's why it >errors out? >> > >That would be my guess. Maybe someone more knowledgeable on how mdadm >writes stuff on the disk can jump in and provide additional info. But >I'm pretty sure, if you install grub in md0, it's not in that place on >the disk where the bios is actually looking for. > >> >> It seems to me then that I *have* to create normal partitions on >/dev/sda & >> /dev/sdb, or I would need a different boot drive. Is there another >way to >> overcome this problem. > >Maybe create two mds. md1 (sda1, sdb1) is a small boot partition which >contains stage2+, the kernel and the initramfs. And md2 (sda2, sdb2) >which acts as another block device with partition table, etc... >In this setup you could install grub in the mbr of sda and sdb >(grub-install /dev/sda...) > >A quick google on this subject returned no usable results. But I am off >now until tomorrow.
I would suggest trying it by usong the older metadata format. Check the man pages, but I thinl it would be --metadata=0.90 (or similar) during creation. That might put the metadata at the end, rather then at the front. (Or it's the other way round and new metadata does it at the end.) -- Joost Ps. I have never tried it this way (full disk raid for boot device) using linux software raid. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
