Bug#778283: systemd-fsck mis-detects rotating disks and ignores passno

[Stefan Fritsch]

Package: systemd
Version: 215-11
Severity: normal

According to the systemd-fsck man page, it should not start multiple
fscks on the same rotating disk in parallel but that does not seem to
work on LVM. The fstab has the passno field to configure the fsck order
manuall but systemd-fsck ignores its value. This is a big problem
because it greatly increases the time required for fsck. And systems
with systemd tend to do a lot of unneccessary fscks because of #755722.

systemd-fsck should 

- correctly detect rotating disks with LVM
- provide a way to override the detection manually
- if it cannot detect what disks the filesystems are on (possibly
  because the stacking with md/lvm/crypto/iscsi/... is too complex),
  it should NOT start fscks in parallel.

-- Package-specific info:

-- System Information:
Debian Release: 8.0
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/8 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages systemd depends on:
ii  acl             2.2.52-2
ii  adduser         3.113+nmu3
ii  initscripts     2.88dsf-58
ii  libacl1         2.2.52-2
ii  libaudit1       1:2.4-1+b1
ii  libblkid1       2.25.2-5
ii  libc6           2.19-15
ii  libcap2         1:2.24-6
ii  libcap2-bin     1:2.24-6
ii  libcryptsetup4  2:1.6.6-5
ii  libgcrypt20     1.6.2-4+b1
ii  libkmod2        18-3
ii  liblzma5        5.1.1alpha+20120614-2+b3
ii  libpam0g        1.1.8-3.1
ii  libselinux1     2.3-2
ii  libsystemd0     215-11
ii  mount           2.25.2-5
ii  sysv-rc         2.88dsf-58
ii  udev            215-11
ii  util-linux      2.25.2-5

Versions of packages systemd recommends:
ii  dbus            1.8.16-1
ii  libpam-systemd  215-11

Versions of packages systemd suggests:
pn  systemd-ui  <none>

-- no debconf information