[Bug 1802525] Re: (s)ata disks do not have /dev/disk/by-path links created

[Brian Murray]

Hello Dan, or anyone else affected,

Accepted systemd into trusty-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/systemd/204-5ubuntu20.29 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-trusty to verification-done-trusty. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-trusty. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: systemd (Ubuntu Trusty)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-trusty

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1802525

Title:
  (s)ata disks do not have /dev/disk/by-path links created

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Trusty:
  Fix Committed

Bug description:
  [impact]

  udev (in trusty) does not create symlinks in /dev/disk/by-path/ for
  any disks that are connected via sata.

  [test case]

  Install trusty onto a system with sata drives, and check /dev/disk/by-
  path/ for symlink(s) to those sata drive(s).

  [regression potential]

  the (s)ata by-path symlinks were removed due to apparent possibility of non-uniqueness:
  https://git.kernel.org/pub/scm/linux/hotplug/udev.git/commit/?id=481dcf7c8f

  however that was *long* ago and it has been added back in:
  https://github.com/systemd/systemd/commit/ba86822db70d9ffd02ad78cd02b237ff8c569c7a

  if there is still a possibility for non-uniqueness, then /dev/disk/by-
  path/ symlink(s) might be created that are non-deterministic as far as
  the actual disk/path they point to.

  [other info]

  this is 'fixed' (the by-path symlinks are created for ata disks) in
  Xenial and later systemd/udev.

  Also bug 1611945 indicates that sata devices connected via PMP (port
  multiplier device) may still have incorrect by-path symlinks created,
  even upstream.  However, since Xenial and later currently do have udev
  code that creates ata by-path symlinks, that is a separate issue and
  not a reason for keeping ata by-path symlinks about of trusty udev.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1802525/+subscriptions