マウントされたパーティションに関連する「dmesg」出力の奇妙なエラー

マウントされたパーティションに関連する「dmesg」出力の奇妙なエラー

使用済みの論理ボリュームを含む拡張パーティションである、起動時のマウントdmesgに関連する出力に、いくつかの奇妙なエラーが表示されています。sda4

dmesg以下は、起動直後の出力の抜粋です。[UFW BLOCK]ただし、途中でファイアウォールのエントリをいくつか削除しました。

[  842.165660] SGI XFS with ACLs, security attributes, realtime, no debug enabled
[  842.372589] JFS: nTxBlock = 8192, nTxLock = 65536
[  842.668365] ntfs: driver 2.1.32 [Flags: R/O MODULE].
[  843.035074] QNX4 filesystem 0.2.3 registered.
[  843.288031] raid6: sse2x1   gen()  2212 MB/s
[  843.356052] raid6: sse2x1   xor()  1599 MB/s
[  843.424044] raid6: sse2x2   gen()  3118 MB/s
[  843.492027] raid6: sse2x2   xor()  1502 MB/s
[  843.560047] raid6: sse2x4   gen()  2975 MB/s
[  843.628024] raid6: sse2x4   xor()  1857 MB/s
[  843.628034] raid6: using algorithm sse2x2 gen() 3118 MB/s
[  843.628037] raid6: .... xor() 1502 MB/s, rmw enabled
[  843.628041] raid6: using intx1 recovery algorithm
[  843.660527] xor: measuring software checksum speed
[  843.700031]    prefetch64-sse:  3182.000 MB/sec
[  843.740020]    generic_sse:  3851.000 MB/sec
[  843.740028] xor: using function: generic_sse (3851.000 MB/sec)
[  843.869982] Btrfs loaded
[  845.893662] EXT4-fs (sda4): unable to read superblock
[  845.896625] EXT4-fs (sda4): unable to read superblock
[  845.900337] EXT4-fs (sda4): unable to read superblock
[  845.903455] FAT-fs (sda4): invalid media value (0xda)
[  845.903464] FAT-fs (sda4): Can't find a valid FAT filesystem
[  845.912432] XFS (sda4): Invalid superblock magic number
[  845.919404] FAT-fs (sda4): invalid media value (0xda)
[  845.919413] FAT-fs (sda4): Can't find a valid FAT filesystem
[  845.927924] MINIX-fs: unable to read superblock
[  846.001284] attempt to access beyond end of device
[  846.001293] sda4: rw=16, want=3, limit=2
[  846.001300] hfsplus: unable to find HFS+ superblock
[  846.014902] qnx4: no qnx4 filesystem (no root dir).
[  846.018195] 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
[  846.024054] hfs: can't find a HFS filesystem on dev sda4
[  890.554489] EXT4-fs (sda4): unable to read superblock
[  890.557377] EXT4-fs (sda4): unable to read superblock
[  890.560315] EXT4-fs (sda4): unable to read superblock
[  890.563428] FAT-fs (sda4): invalid media value (0xda)
[  890.563436] FAT-fs (sda4): Can't find a valid FAT filesystem
[  890.573590] XFS (sda4): Invalid superblock magic number
[  890.579829] FAT-fs (sda4): invalid media value (0xda)
[  890.579838] FAT-fs (sda4): Can't find a valid FAT filesystem
[  890.591160] MINIX-fs: unable to read superblock
[  890.596813] attempt to access beyond end of device
[  890.596837] sda4: rw=16, want=3, limit=2
[  890.596876] hfsplus: unable to find HFS+ superblock
[  890.601952] qnx4: no qnx4 filesystem (no root dir).
[  890.607635] 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
[  890.613446] hfs: can't find a HFS filesystem on dev sda4
[ 2111.590730] perf interrupt took too long (2505 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
[ 2323.551898] EXT4-fs (sda4): unable to read superblock
[ 2323.555029] EXT4-fs (sda4): unable to read superblock
[ 2323.558560] EXT4-fs (sda4): unable to read superblock
[ 2323.561654] FAT-fs (sda4): invalid media value (0xda)
[ 2323.561662] FAT-fs (sda4): Can't find a valid FAT filesystem
[ 2323.570667] XFS (sda4): Invalid superblock magic number
[ 2323.577885] FAT-fs (sda4): invalid media value (0xda)
[ 2323.577893] FAT-fs (sda4): Can't find a valid FAT filesystem
[ 2323.588531] MINIX-fs: unable to read superblock
[ 2323.594927] attempt to access beyond end of device
[ 2323.594937] sda4: rw=16, want=3, limit=2
[ 2323.594943] hfsplus: unable to find HFS+ superblock
[ 2323.599796] qnx4: no qnx4 filesystem (no root dir).
[ 2323.603466] 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
[ 2323.627446] hfs: can't find a HFS filesystem on dev sda4
[ 2347.927763] EXT4-fs (sda4): unable to read superblock
[ 2347.937927] EXT4-fs (sda4): unable to read superblock
[ 2347.943278] EXT4-fs (sda4): unable to read superblock
[ 2347.954206] FAT-fs (sda4): invalid media value (0xda)
[ 2347.954217] FAT-fs (sda4): Can't find a valid FAT filesystem
[ 2348.020480] XFS (sda4): Invalid superblock magic number
[ 2348.049075] FAT-fs (sda4): invalid media value (0xda)
[ 2348.049085] FAT-fs (sda4): Can't find a valid FAT filesystem
[ 2348.062423] MINIX-fs: unable to read superblock
[ 2348.066949] attempt to access beyond end of device
[ 2348.066959] sda4: rw=16, want=3, limit=2
[ 2348.066965] hfsplus: unable to find HFS+ superblock
[ 2348.071702] qnx4: no qnx4 filesystem (no root dir).
[ 2348.076214] 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
[ 2348.095021] hfs: can't find a HFS filesystem on dev sda4

私のシステム (Ubuntu 15.10 64 ビット) とパーティションに関する詳細情報は次のとおりです。

出力lsblk /dev/sda:

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 232,9G  0 disk 
├─sda1   8:1    0   100M  0 part /win/boot
├─sda2   8:2    0    74G  0 part /win/c
├─sda3   8:3    0     8G  0 part /boot
├─sda4   8:4    0     1K  0 part 
├─sda5   8:5    0  31,3G  0 part /images
├─sda6   8:6    0    40G  0 part /
├─sda7   8:7    0    60G  0 part /home
├─sda8   8:8    0    15G  0 part /win/share
└─sda9   8:9    0   4,6G  0 part [SWAP]

出力sudo parted -l /dev/sda:

Model: ATA Hitachi HDS72102 (scsi)
Disk /dev/sda: 250GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type      File system     Flags
 1      1049kB  106MB   105MB   primary   ntfs            boot
 2      106MB   79,6GB  79,4GB  primary   ntfs
 3      79,6GB  88,1GB  8590MB  primary   ext4
 4      88,1GB  250GB   162GB   extended
 6      88,1GB  131GB   42,9GB  logical   ext4
 7      131GB   196GB   64,4GB  logical   ext4
 8      196GB   212GB   16,1GB  logical   fat32
 9      212GB   217GB   4876MB  logical   linux-swap(v1)
 5      217GB   250GB   33,6GB  logical   ext4

出力mount | grep /dev/sda:

/dev/sda6 on / type ext4 (rw,relatime,errors=remount-ro,data=ordered)
/dev/sda1 on /win/boot type fuseblk (rw,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096)
/dev/sda2 on /win/c type fuseblk (rw,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096)
/dev/sda7 on /home type ext4 (rw,relatime,data=ordered)
/dev/sda5 on /images type ext4 (rw,relatime,data=ordered)
/dev/sda3 on /boot type ext4 (rw,relatime,data=ordered)
/dev/sda8 on /win/share type vfat (rw,relatime,gid=46,fmask=0007,dmask=0007,allow_utime=0020,codepage=437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro)

の内容/etc/fstab

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>

# / was on /dev/sda6 during installation
UUID=eee18451-b607-4875-8a88-c9cb6c6544c8 /               ext4    errors=remount-ro 0       1

# /boot was on /dev/sda3 during installation
UUID=6dbb8633-dadd-4b5e-8d85-b0895fde9dfb /boot           ext4    defaults        0       2

# /home was on /dev/sda7 during installation
UUID=485b3ef1-7216-4053-b25c-f656d529e8e6 /home           ext4    defaults        0       2

# /images was on /dev/sda5 during installation
UUID=81dc42c4-a161-4ccd-b704-6e5c09298943 /images         ext4    defaults        0       2


# /old partition image file of previous 15.04 installation
/images/backup/ubuntu-vivid-151028-ext4.img /old          ext4    defaults,ro


# /win/boot was on /dev/sda1 during installation
UUID=90DCF3A5DCF3842E /win/boot       ntfs    defaults,umask=007,gid=46 0       0

# /win/c was on /dev/sda2 during installation
UUID=482C7A572C7A3FCC /win/c          ntfs    defaults,umask=007,gid=46 0       0

# /win/share was on /dev/sda8 during installation
UUID=B148-49F9  /win/share      vfat    utf8,umask=007,gid=46 0       1


# swap was on /dev/sda9 during installation
UUID=4b184fdc-fe7a-4019-92e4-8a6607fe7291 none            swap    sw              0       0


/dev/fd0        /media/floppy0  auto    rw,user,noauto,exec,utf8 0       0

答え1

遅くなりましたが、Debian のバグを見つけました:https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=794849

問題は os-prober にあるようで、新しいカーネルがインストールされると実行されます。更新前には dmesg 出力にこれらのエントリがなかったシステムで更新をテストしたところ、更新後にこれらのエントリが表示されました。

関連情報