On 05/26/2018 08:07 PM, Chris Ross wrote: >> Just add a boot partition for GRUB. It doesn't have to be large. > > Okay. But, as I mentioned, I don't want to have anything that exists on > only one spinning disk. Is there a way to mirror a partition onto a second > disk that can still be something GRUB can load to/from? It doesn't have to > be ZFS, but it does have to be replicated so that if a disk fails, I can > boot from another.
You can just mirror the partition to each disk, then GRUB can just boot from any of the disks. >>>> Btw, I'm surprised to read that the T5120 supports GPT disk labels? I >>>> thought that GPT is supported on T4 and newer only. >>> >>> I believe the same, I don't know what that error message means. I know that >>> I do have sun labels, not GPT labels, on my disks. >> >> Can you print your partition layout with parted and post it here? > > Attached. Oh. I see now that I was wrong, only the fourth disk (what I did > the initial install onto, and plan to make a ZFS spare) is sun. The other > three are gpt. So, may be totally unusable anyway. But, it explains the > message grub gave me. Clearly I've gone astray somewhere. :-) The Sun partition table is only needed for a given disk if you want to be able to boot from that disk. The kernel itself supports any of the partition tables that parted supports. > So, if we presume that my T5120 won't handle gpt disks, then I'll have to > repartition the first three disks back to sun. At which point, I may or > may not have the exact same problem with grub if I make them only have one > bit zfs partition. Before I do that, I'm happy to hear suggestions of what > partitions to put on those disks when switching them to a sun partition table. If all of the disks shall be bootable from GRUB, they have to have a Sun partition table. But you should maybe post your GRUB-specific questions on the GRUB mailing list. I have never tried ZFS as a boot partition so I don't really know which configurations are supported. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - [email protected] `. `' Freie Universitaet Berlin - [email protected] `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
