[Bug 1601997] Re: Ubuntu 16.10 installer sets metadata_csum option on ext4 partition which is incompatible with other LTS Ubuntu versions

[Francesco Fumanti]

I have got a problem because of the non-matching features, too: I
formatted a new drive with ext4 under Ubuntu 16.10 and added it to the
fstab of my precise and trusty installations.

These two LTS installations stop during the boot press giving me an
error because e2fsck does not recognize the new features. (The problem
does not occur for xenial.)

As Norbert and Theodor above: e2fsprogs 1.43 should be backported to
precise and trusty; especially now that the new features are enabled by
default.

In trusty, I am now using Daniel Mehrmann's PPA, which is offering a
snapshot of e2fsck 1.43.

Daniel Mehrmann's package does not build in precise because it seems to
need a newer version of libc6.

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https://bugs.launchpad.net/bugs/1601997

Title:
  Ubuntu 16.10 installer sets metadata_csum option on ext4 partition
  which is incompatible with other LTS Ubuntu versions

Status in e2fsprogs package in Ubuntu:
  Invalid

Bug description:
  Ubuntu 16.10 installer sets metadata_csum option on ext4 partition
  which is incompatible with other LTS Ubuntu versions (12.04 LTS, 14.04
  LTS, 16.04 LTS).

  Steps to reproduce:
  1. Download Ubuntu 16.10 installation media.
  2. Install Ubuntu.
  3. Try to do fsck -fy /dev/sdX1 from other supported Ubuntu distro.

  Expected results:
  User can check and fix errors on ext4 filesystem, created on Ubuntu 16.10.

  Actual results:
  User can not check and fix errors on ext4 filesystem because of lack of 'metadata_csum' option in previous LTS Ubuntu versions.
  The only one working solution was to scan from 16.10 live install media.

  Note:
  it is known, that Dan Watkins disabled metadata_csum when creating ext4 filesystems ( see http://bazaar.launchpad.net/~daniel-thewatkins/maas-images/fix-yakkety-builds/revision/305 ). It is good solution.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: e2fsprogs 1.43.1-1
  ProcVersionSignature: Ubuntu 4.4.0-30.49-generic 4.4.13
  Uname: Linux 4.4.0-30-generic i686
  ApportVersion: 2.20.2-0ubuntu1
  Architecture: i386
  CurrentDesktop: Unity
  Date: Mon Jul 11 23:42:49 2016
  SourcePackage: e2fsprogs
  UpgradeStatus: No upgrade log present (probably fresh install)

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