[Bug 1579609] [NEW] [Xenial] >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old

Yung Shen 1579609 at bugs.launchpad.net
Mon May 9 03:48:57 UTC 2016


Public bug reported:

According to this it should be fixed
https://bugs.launchpad.net/ubuntu/+source/os-
prober/+bug/1374759/comments/32

But on my system I intended to install system root on /dev/sdb1 and noticed these warning message in my system log:
$ journalctl -p err -b -k --no-pager

-- Logs begin at Sun 2016-05-08 10:47:49 CST, end at Mon 2016-05-09 11:42:04 CST. --
May 08 10:47:50 X230 kernel: [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
May 08 10:47:50 X230 kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
May 08 10:55:34 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
May 08 10:55:34 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
May 08 10:55:34 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
May 08 10:55:34 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
May 08 10:55:34 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                             mount -t ufs -o
ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
...

                             >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
May 08 10:55:34 X230 kernel: ufs: ufs_fill_super(): bad magic number
May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
May 08 10:55:34 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
May 08 10:55:34 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
May 08 10:55:34 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
May 08 10:55:34 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
May 08 10:55:34 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                             mount -t ufs -o
ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
...

                             >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
May 08 10:55:34 X230 kernel: ufs: ufs_fill_super(): bad magic number
May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
May 08 10:55:52 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
May 08 10:55:52 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
May 08 10:55:52 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
May 08 10:55:52 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
May 08 10:55:52 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                             mount -t ufs -o
ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
...

                             >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
May 08 10:55:52 X230 kernel: ufs: ufs_fill_super(): bad magic number
May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
May 08 10:55:52 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
May 08 10:55:52 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
May 08 10:55:52 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
May 08 10:55:52 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
May 08 10:55:52 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                             mount -t ufs -o
ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
...

                             >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
May 08 10:55:52 X230 kernel: ufs: ufs_fill_super(): bad magic number
May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
May 08 10:55:59 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
May 08 10:55:59 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
May 08 10:55:59 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
May 08 10:55:59 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
May 08 10:55:59 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                             mount -t ufs -o
ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
...

                             >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
May 08 10:55:59 X230 kernel: ufs: ufs_fill_super(): bad magic number
May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
May 08 10:55:59 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
May 08 10:55:59 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
May 08 10:55:59 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
May 08 10:55:59 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
May 08 10:55:59 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                             mount -t ufs -o
ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
...

                             >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
May 08 10:55:59 X230 kernel: ufs: ufs_fill_super(): bad magic number
May 08 21:16:00 X230 kernel: ACPI: \_SB_.PCI0.LPC_.EC__.BAT1: Unable to dock!

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: os-prober 1.70ubuntu3
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
CurrentDesktop: Unity
Date: Mon May  9 11:42:57 2016
Dependencies:
 gcc-6-base 6.0.1-0ubuntu1
 libc6 2.23-0ubuntu3
 libgcc1 1:6.0.1-0ubuntu1
InstallationDate: Installed on 2016-05-03 (5 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: os-prober
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: os-prober (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

** Description changed:

  According to this it should be fixed
  https://bugs.launchpad.net/ubuntu/+source/os-
  prober/+bug/1374759/comments/32
  
- But on my system I intended to install on /dev/sdb1 and noticed these
- warning message in my syslog
+ But on my system I intended to install on /dev/sdb1 and noticed these warning message in my system log:
+ $ journalctl -p err -b -k --no-pager
+ 
+ -- Logs begin at Sun 2016-05-08 10:47:49 CST, end at Mon 2016-05-09 11:42:04 CST. --
+ May 08 10:47:50 X230 kernel: [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
+ May 08 10:47:50 X230 kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
+ May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
+ May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
+ May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
+ May 08 10:55:34 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
+ May 08 10:55:34 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
+ May 08 10:55:34 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
+ May 08 10:55:34 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
+ May 08 10:55:34 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
+                              
+                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
+                              
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ May 08 10:55:34 X230 kernel: ufs: ufs_fill_super(): bad magic number
+ May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
+ May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
+ May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
+ May 08 10:55:34 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
+ May 08 10:55:34 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
+ May 08 10:55:34 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
+ May 08 10:55:34 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
+ May 08 10:55:34 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
+                              
+                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
+                              
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ May 08 10:55:34 X230 kernel: ufs: ufs_fill_super(): bad magic number
+ May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
+ May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
+ May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
+ May 08 10:55:52 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
+ May 08 10:55:52 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
+ May 08 10:55:52 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
+ May 08 10:55:52 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
+ May 08 10:55:52 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
+                              
+                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
+                              
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ May 08 10:55:52 X230 kernel: ufs: ufs_fill_super(): bad magic number
+ May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
+ May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
+ May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
+ May 08 10:55:52 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
+ May 08 10:55:52 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
+ May 08 10:55:52 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
+ May 08 10:55:52 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
+ May 08 10:55:52 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
+                              
+                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
+                              
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ May 08 10:55:52 X230 kernel: ufs: ufs_fill_super(): bad magic number
+ May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
+ May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
+ May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
+ May 08 10:55:59 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
+ May 08 10:55:59 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
+ May 08 10:55:59 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
+ May 08 10:55:59 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
+ May 08 10:55:59 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
+                              
+                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
+                              
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ May 08 10:55:59 X230 kernel: ufs: ufs_fill_super(): bad magic number
+ May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
+ May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
+ May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
+ May 08 10:55:59 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
+ May 08 10:55:59 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
+ May 08 10:55:59 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
+ May 08 10:55:59 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
+ May 08 10:55:59 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
+                              
+                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
+                              
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ May 08 10:55:59 X230 kernel: ufs: ufs_fill_super(): bad magic number
+ May 08 21:16:00 X230 kernel: ACPI: \_SB_.PCI0.LPC_.EC__.BAT1: Unable to dock!
+ 
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: os-prober 1.70ubuntu3
  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
  CurrentDesktop: Unity
  Date: Mon May  9 11:42:57 2016
  Dependencies:
-  gcc-6-base 6.0.1-0ubuntu1
-  libc6 2.23-0ubuntu3
-  libgcc1 1:6.0.1-0ubuntu1
+  gcc-6-base 6.0.1-0ubuntu1
+  libc6 2.23-0ubuntu3
+  libgcc1 1:6.0.1-0ubuntu1
  InstallationDate: Installed on 2016-05-03 (5 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  SourcePackage: os-prober
  UpgradeStatus: No upgrade log present (probably fresh install)

** Description changed:

  According to this it should be fixed
  https://bugs.launchpad.net/ubuntu/+source/os-
  prober/+bug/1374759/comments/32
  
- But on my system I intended to install on /dev/sdb1 and noticed these warning message in my system log:
+ But on my system I intended to install system root on /dev/sdb1 and noticed these warning message in my system log:
  $ journalctl -p err -b -k --no-pager
  
  -- Logs begin at Sun 2016-05-08 10:47:49 CST, end at Mon 2016-05-09 11:42:04 CST. --
  May 08 10:47:50 X230 kernel: [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
  May 08 10:47:50 X230 kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:34 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
  May 08 10:55:34 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:34 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:34 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
-                              
-                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
-                              
-                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ 
+                              mount -t ufs -o
+ ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
+ ...
+ 
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:34 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:34 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
  May 08 10:55:34 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:34 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:34 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
-                              
-                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
-                              
-                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ 
+                              mount -t ufs -o
+ ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
+ ...
+ 
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:34 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:52 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
  May 08 10:55:52 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:52 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:52 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
-                              
-                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
-                              
-                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ 
+                              mount -t ufs -o
+ ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
+ ...
+ 
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:52 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:52 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
  May 08 10:55:52 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:52 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:52 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
-                              
-                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
-                              
-                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ 
+                              mount -t ufs -o
+ ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
+ ...
+ 
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:52 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:59 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
  May 08 10:55:59 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:59 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:59 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
-                              
-                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
-                              
-                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ 
+                              mount -t ufs -o
+ ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
+ ...
+ 
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:59 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:59 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
  May 08 10:55:59 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:59 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:59 X230 kernel: ufs: You didn't specify the type of your ufs filesystem
-                              
-                              mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
-                              
-                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
+ 
+                              mount -t ufs -o
+ ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep
+ ...
+ 
+                              >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:59 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 21:16:00 X230 kernel: ACPI: \_SB_.PCI0.LPC_.EC__.BAT1: Unable to dock!
- 
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: os-prober 1.70ubuntu3
  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
  CurrentDesktop: Unity
  Date: Mon May  9 11:42:57 2016
  Dependencies:
   gcc-6-base 6.0.1-0ubuntu1
   libc6 2.23-0ubuntu3
   libgcc1 1:6.0.1-0ubuntu1
  InstallationDate: Installed on 2016-05-03 (5 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  SourcePackage: os-prober
  UpgradeStatus: No upgrade log present (probably fresh install)

-- 
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https://bugs.launchpad.net/bugs/1579609

Title:
  [Xenial] >>>WARNING<<< Wrong ufstype may corrupt your filesystem,
  default is ufstype=old

Status in os-prober package in Ubuntu:
  New

Bug description:
  According to this it should be fixed
  https://bugs.launchpad.net/ubuntu/+source/os-
  prober/+bug/1374759/comments/32

  But on my system I intended to install system root on /dev/sdb1 and noticed these warning message in my system log:
  $ journalctl -p err -b -k --no-pager

  -- Logs begin at Sun 2016-05-08 10:47:49 CST, end at Mon 2016-05-09 11:42:04 CST. --
  May 08 10:47:50 X230 kernel: [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
  May 08 10:47:50 X230 kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:34 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
  May 08 10:55:34 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:34 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:34 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                               mount -t ufs -o
  ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-
  cd|openstep ...

                               >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:34 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:34 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:34 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
  May 08 10:55:34 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:34 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:34 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                               mount -t ufs -o
  ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-
  cd|openstep ...

                               >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:34 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:52 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
  May 08 10:55:52 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:52 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:52 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                               mount -t ufs -o
  ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-
  cd|openstep ...

                               >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:52 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:52 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:52 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
  May 08 10:55:52 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:52 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:52 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                               mount -t ufs -o
  ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-
  cd|openstep ...

                               >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:52 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:59 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
  May 08 10:55:59 X230 kernel: FAT-fs (sdb1): invalid media value (0x7d)
  May 08 10:55:59 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:59 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                               mount -t ufs -o
  ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-
  cd|openstep ...

                               >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:59 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: EXT4-fs (sdb4): VFS: Can't find ext4 filesystem
  May 08 10:55:59 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:59 X230 kernel: squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on sdb4
  May 08 10:55:59 X230 kernel: FAT-fs (sdb4): bogus number of reserved sectors
  May 08 10:55:59 X230 kernel: qnx4: no qnx4 filesystem (no root dir).
  May 08 10:55:59 X230 kernel: ufs: You didn't specify the type of your ufs filesystem

                               mount -t ufs -o
  ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-
  cd|openstep ...

                               >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  May 08 10:55:59 X230 kernel: ufs: ufs_fill_super(): bad magic number
  May 08 21:16:00 X230 kernel: ACPI: \_SB_.PCI0.LPC_.EC__.BAT1: Unable to dock!

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: os-prober 1.70ubuntu3
  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
  CurrentDesktop: Unity
  Date: Mon May  9 11:42:57 2016
  Dependencies:
   gcc-6-base 6.0.1-0ubuntu1
   libc6 2.23-0ubuntu3
   libgcc1 1:6.0.1-0ubuntu1
  InstallationDate: Installed on 2016-05-03 (5 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  SourcePackage: os-prober
  UpgradeStatus: No upgrade log present (probably fresh install)

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