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? Meanwhile, there is no MBR or partition table on /dev/sda or /dev/sdb for BIOS to jump to. Hmm ... 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. > Is a setup as you wish - sda and sdb as raid1, and partitions only on > md0 - bootable in general? Yes, in this case. It makes easy to set a faulty drive in failed state and remove it from RAID in a single step, rather than the alternative which would involve removing multiple /dev/mdX, one for each partition. I could I guess install LVM on top of RAID, but this adds complexity for a functionality (increasing LV sizes) which will not be used in this implementation. Any suggestions welcome. -- Regards, Mick
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