On Wed, Feb 3, 2016 at 11:14 AM, Hendrik Friedel <hend...@friedels.name> wrote: > Sorry, I missed this: >> What do you get for rpm -q grub2 > grub2-2.02-0.34.el7.centos.x86_64 >
Weird. I was not able to reproduce the problem with CentOS 7.0 doing the following in virt-manager with two qcow2s backing /dev/vda and /dev/vdb. 1. Install only to /dev/vda using custom partitioning, partition scheme is btrfs. 2. Reboot. 3. Install btrfs-progs-4.4-1.fc23.x86_64.rpm 4. Install kernel-ml-4.4.1-1.el7.elrepo.x86_64.rpm ## I did those installs separately to make sure the newer progs goes in the initramfs that's created when the newer kernel is installed; it's just a time savings is all. 5. Reboot 6. btrfs dev add /dev/vdb / 7. Reboot 8. yum upgrade ## at this point both devices have chunks 9. Reboot 10. btrfs balance start / ## now only vdb has chunks (due to how single balance allocator works, and vdb is bigger than vda2) 11. Reboot. ## still works Of course with a VM it's better to just grow the backing device, and then something like 'btrfs fi resize max /' rather than have two devices. But on a real system, you'd have two devices (with the caveat that this is more fragile a setup than a single device because of course if either device dies, the whole Btrfs volume implodes). I can try it without any updates and see if it works.... -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
