[Bug 1579739] Re: ubuntu 16.04 install fails at grub install on btrfs

Phillip Susi psusi at ubuntu.com
Mon May 9 13:34:03 UTC 2016

Your disk is partitioned using GPT but you are booting in bios mode.
You must create a 1 mb bios_grub partition to do this.

** Changed in: grub-installer (Ubuntu)
       Status: New => Invalid

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  ubuntu 16.04 install fails at grub install on btrfs

Status in grub-installer package in Ubuntu:

Bug description:
  root at ubuntu:/# parted -l
  Model: ATA WDC WD5000BPKX-2 (scsi)
  Disk /dev/sdb: 500GB
  Sector size (logical/physical): 512B/4096B
  Partition Table: gpt
  Disk Flags: 
  Number  Start   End     Size    File system  Name  Flags
   1      105MB   1153MB  1049MB  btrfs
   2      1153MB  11.6GB  10.5GB  btrfs
   3      11.6GB  116GB   105GB   btrfs

  root at ubuntu:/# mount
  /dev/sdb2 on /yourmom type btrfs (rw,relatime,space_cache,subvolid=5,subvol=/)
  /dev/sdb1 on /yourmom/boot type btrfs (rw,relatime,space_cache,subvolid=5,subvol=/)

  root at ubuntu:/# grub-install --root-directory=/yourmom /dev/sdb
  Installing for i386-pc platform.
  grub-install: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
  grub-install: error: filesystem `btrfs' doesn't support blocklists.

  The 1000M partition is for /boot, the 10G for /, the 100G for /home.
  I created the partitions using gparted 0.25.0
  The release of Ubuntu is 16.04
  I expected grub-install to succeed as there is plenty of space before the first partition.

  ubuntu at ubuntu:~$ apt-cache policy grub2-common 
    Installed: 2.02~beta2-36ubuntu3
    Candidate: 2.02~beta2-36ubuntu3
    Version table:
   *** 2.02~beta2-36ubuntu3 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

  I got the install working by using an msdos table and an unformatted
  primary partition instead of free space at the beginning of the disk :

  (parted) print all
  Model: ATA WDC WD5000BPKX-2 (scsi)
  Disk /dev/sdb: 500GB
  Sector size (logical/physical): 512B/4096B
  Partition Table: msdos
  Disk Flags: 
  Number  Start   End     Size    Type      File system  Flags
   1      10.5MB  115MB   105MB   primary                boot
   2      115MB   500GB   500GB   extended
   5      116MB   1165MB  1049MB  logical   btrfs
   6      1166MB  11.7GB  10.5GB  logical   btrfs
   7      11.7GB  117GB   105GB   logical   btrfs

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.376
  Date: Mon May  9 07:28:51 2016
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash ---
  LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
   PATH=(custom, no user)
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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