On Thu, 2018-11-15 at 19:56:56 +0100, Steffen Grunewald wrote: > On Mon, 2018-11-12 at 12:54:52 +0800, Chris Hsiang wrote: > > Dear Steffen > > > > How do you install debians os afterwards and config grub? follow > > https://github.com/zfsonlinux/zfs/wiki/Debian-Stretch-Root-on-ZFS > > or?? > > Hi Chris, > > Basically that's the document, yes. I didn't get that far yet, other > duties interrupted my work. I have a nfsroot that can find and report > existing zfs pools, so the sysinfo part is ready, but whether I'll > be able to install a zfs root without or with UEFI enabled still has > to be found out. (There's another article suggesting that the "with > UEFI" kind might be easier, because you'll have access to the > bootloader via a separate partition - that gets created by zpool > create anyway.) > I'm planning to report back when it's done, this or the other way.
After fiddling a bit with grub installation, starting with the GRUB_PC/10-setup script from the examples, I'm finding the following: Setting up a root zpool mirroring three disks, I get BOOT_DEVICE="/dev/disk/by-id/ata-INTEL_SSDSC2KW128G8_PHLA805104HX128BGN /dev/disk/by-id/ata-INTEL_SSDSC2KW128G8_PHLA805102QH128BGN /dev/disk/by-id/ata-INTEL_SSDSC2KW128G8_PHLA805007K6128BGN" which looks innocent. 10-setup although converts this to GROOT="(hostdisk//dev/sda) (hostdisk//dev/sdm) (hostdisk//dev/sdn)" (actually, there are linefeeds!) If this is passed to a single grub-install command, it chokes at the parentheses. Replacing that one with a loop over all items in $GROOT, and stripping the (), I get failures of the following kind: grub-install: error: cannot find a GRUB drive for hostdisk//dev/sda. Check your device.map. Next step would be to strip the hostdisk/ prefix (why is this there?), but I remember having seen a different problem then. Got to rinse and repeat. BTW, as the linux-headers package gets consistently installed after the spl-dkms one, a trick similar to the nfsroot hook described earlier is also necessary to get the modules built inside the target chroot. I may have to go for UEFI to have a non-ZFS boot partition as written up in http://www.thecrosseroads.net/2016/02/booting-a-zfs-root-via-uefi-on-debian as this starts to eat my precious time. No, I'd like to avoid a MD RAID for /. Thanks, Steffen
