On Wed, 11 Mar 2015 07:45:54 +0100, Stefan G. Weichinger wrote: > yesterday I received a shiny new server for a client. > > It brings 4 x 1 TB SATA disks, is capable of UEFI and I started setting > it up. > > GPT partitioning, small partition(s) for the ESP, some swap, and bigger > partitions of type fd=raid for creating 2 mdadm-raids (rootfs and data) > with level 6. > > ok so far. > > Then I spent some hours fiddling with grub2, gummiboot et al to get that > box booting up fine. dracut doesn't assemble the rootfs-raid etc etc ... > -> fun
I found this with a LUKS root filesystem, dracut doesn't automatically detect such devices any more, so speed up the boot. You need to specify rd.auto or rd.mdraid to force it. > even if I manage to have it booting via UEFI from /dev/sda1 or so ... I > still have this single point of failure as the vfat-partitioned ESP is > on one physical disk only. > > I would like to set it up in a way that it boots even when the /dev/sda > dies ... I generally set up boot on a RAID1 across all disks. You can still access individual disks in a RAID1 array, so you can set your computer to boot from sda1 then sda2 etc but mount /boot on the array, so all updates are pushed to all four disks. -- Neil Bothwick I distinctly remember forgetting that.
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