Warning: /sbin/fsck.btrfs doesn't exist, can't install to initramfs, ignoring.

[Cristian Aravena Romero]

Upgrade distrobution Ubuntu 15.10 (Development):

Warning: /sbin/fsck.btrfs doesn't exist, can't install to initramfs, ignoring.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: btrfs-tools 4.0-2
ProcVersionSignature: Ubuntu 4.2.0-10.12-generic 4.2.0
Uname: Linux 4.2.0-10-generic x86_64
ApportVersion: 2.18.1-0ubuntu1
Architecture: amd64
CurrentDesktop: GNOME
Date: Wed Sep 23 15:24:29 2015
InstallationDate: Installed on 2015-07-26 (59 days ago)
InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Alpha amd64 (20150723)
SourcePackage: btrfs-tools
UpgradeStatus: No upgrade log present (probably fresh install)

This is because fsck.btrfs (as well as mkfs.btrfs) were being installed into /bin instead of /sbin proper.

The consequence is severe. Because fsck.btrfs isn't copied into the ramdisk, if the root filesystem is btrfs and an unclean shutdown occurs to the point where it requires a manual check, the admin will not be able to do a manual check, and thus the file system remains corrupted and irreparable. The admin may be able to work around by booting from an Ubuntu DVD, grabbing the btrfs-tools package and fix the disc from there, but it is additional work and time consuming.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Winckler (winckler)]

Probably related to: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=784234

[Alberto Salvia Novella (es20490446e)]

Please:

1. Edit the bug description, show it is crystalline what the consequences of this error are.
2. Set this bug status back to "confirmed".

Thank you.

[Cristian Aravena Romero (caravena)]

==Solution tmp==
1) $sudo ln -s /bin/fsck.btrfs /sbin/
2) $sudo update-initramfs -u

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[vsechto (blogspot)]

thanks Cristian Aravena Romero (caravena) is work!

[Alberto Salvia Novella (es20490446e)]

Please:

1. Edit the bug description, show it is obvious what the consequences of this error are.
2. Set this bug status back to "confirmed".

Thank you.

[David Lee (ramchyld)]

Yes, I've noticed and reported this error under bug 1514203. It's not only fsck.btrfs, mkfs.btrfs also gets installed to /bin.

[Thomas (t-hartwig)]

@Alberto: Can you explain please what is unclear in the bug description, "can't install to initramfs" is a crystal clear problem which has to be addressed to, it is absolutely independent of any consequences.

BTW, thanks Christian for the workaround.

[Jason Straight (jason-jeetkunedomaster)]

Perhaps this is because btrfs fsck is the last thing you're supposed to do in recovering a btrfs filesystem, currently?

https://btrfs.wiki.kernel.org/index.php/Btrfsck

"btrfs check --repair, aka btrfsck is your last option if the ones above have not worked"

[vitalii (vitalii-voloshyn)]

@Jason, no you are wrong:
fsck.btrfs - do nothing, successfully
it was intentionally made this way