This will get fixed upstream at some point for sure, so having the bug here is probably only useful as a reminder to check that we have an updated-enough GRUB before the next release, or next LTS release at worst.
** Description changed: Filing a note here in case I forget later. It looks like GRUB (2.02-beta2-15) in 14.10 doesn't support XFS's new on-disk metadata format that has CRCs. (rationale: https://www.kernel.org/doc/Documentation/filesystems/xfs-self- describing-metadata.txt) mkfs.xfs -m crc=1,finobt=1 /dev/sdXY creates an XFS with the new on- disk format. This is NOT the default, and probably won't be until kernel support for it has been in distros for a while. - redhat bug with some patches from Dec 2014: https://bugzilla.redhat.com/show_bug.cgi?id=1001279 I haven't yet dug up any changelogs about those patches getting merged into GRUB's upstream git repo. If there's a PPA, or an easy way to build a .deb from git master (or some other way I can easily test git master on an Ubuntu system), I'd be interested and willing to test this. + Testing confirms that xfs crc support was the issue. I made two plain + non-MD partitions to take that out of the equation. I formatted one + with XFS defaults, and the other with XFS crc. I copied my fresh ubuntu + install into each one. I did grub-install /dev/sda while chrooted into + the non-crc xfs, and grub-install /dev/sdb in the CRC one. Booting from + sda worked fine. - (It's possible I'm mistaken here, and my boot problem was from using RAID10,f2, rather than from XFS with crc=1. testing now.) + Booting from sdb (I can tell them apart in the bios boot menu easily, + because they're not the same make), I was dropped into the grub rescue + shell. I could use grub's ls to see data on the non-crc partition, but + not on the crc partition. So it's clear that GRUB doesn't understand + the new XFS metadata v5 format. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1424123 Title: Need to update for XFS crc=1 (non-default) on-disk format change To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1424123/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
