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Thread: Ubunutu Server 12.04 stucks on boot with lvm on root

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  1. #1
    Join Date
    Jun 2008
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    15

    Ubunutu Server 12.04 stucks on boot with lvm on root

    Hi there,

    on boot I can see the error message on 12.04 64bit, with drops into initramfs shell.

    Code:
    ALERT! /dev/mapper/server-root does not exist. Dropping to a shell
    If I do a restart here, the system boots as expected. dmesg shows me then on the booted server:

    Code:
    ..
    [    1.052576] EXT4-fs (dm-1): INFO: recovery required on readonly filesystem
    [    1.053052] EXT4-fs (dm-1): write access will be enabled during recovery
    [    1.124048] Refined TSC clocksource calibration: 2533.331 MHz.
    [    2.074898] EXT4-fs (dm-1): recovery complete
    [    2.182202] EXT4-fs (dm-1): mounted filesystem with ordered data mode. Opts: (null)
    [   11.828779] ADDRCONF(NETDEV_UP): eth0: link is not ready
    [   11.994516] udevd[460]: starting version 175
    [   12.028275] Adding 983036k swap on /dev/mapper/server-swap.  Priority:-1 extents:1 across:983036k 
    [   12.218255] lp: driver loaded but no devices found
    [   12.364920] piix4_smbus 0000:00:01.3: SMBus Host Controller at 0xb100, revision 0
    [   12.863589] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input3
    [   13.389586] EXT4-fs (dm-1): re-mounted. Opts: errors=remount-ro
    ..
    my Server has the following partition layout:

    Code:
    # fdisk -l
    
    Disk /dev/vda: 21.5 GB, 21474836480 bytes
    16 heads, 63 sectors/track, 41610 cylinders, total 41943040 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x0004a569
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/vda1   *        2048      499711      248832   83  Linux
    /dev/vda2          501758    41940991    20719617    5  Extended
    /dev/vda5          501760    41940991    20719616   8e  Linux LVM
    and LVM on root

    Code:
    # lvdisplay
      --- Logical volume ---
      LV Name                /dev/server/root
      VG Name                server
      LV UUID                xhlIAa-rWw8-VlfT-YwJY-cRgb-OP7L-3XDVKQ
      LV Write Access        read/write
      LV snapshot status     source of
                             /dev/server/snaproot [active]
      LV Status              available
      # open                 1
      LV Size                15.10 GiB
      Current LE             3865
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     256
      Block device           252:1
       
      --- Logical volume ---
      LV Name                /dev/server/swap
      VG Name                server
      LV UUID                uL8pej-Yogw-OPjC-kBQ6-QPeC-dXpa-vucgSC
      LV Write Access        read/write
      LV Status              available
      # open                 2
      LV Size                960.00 MiB
      Current LE             240
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     256
      Block device           252:4
       
      --- Logical volume ---
      LV Name                /dev/server/snaproot
      VG Name                server
      LV UUID                ZM3YKY-7SXu-jO48-5Dya-Hx8i-3DBA-3ieTu2
      LV Write Access        read/write
      LV snapshot status     active destination for /dev/server/root
      LV Status              available
      # open                 2
      LV Size                15.10 GiB
      Current LE             3865
      COW-table size         3.72 GiB
      COW-table LE           953
      Allocated to snapshot  31.10% 
      Snapshot chunk size    4.00 KiB
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     256
      Block device           252:3
    Code:
    # vgdisplay 
      --- Volume group ---
      VG Name               server
      System ID             
      Format                lvm2
      Metadata Areas        1
      Metadata Sequence No  55
      VG Access             read/write
      VG Status             resizable
      MAX LV                0
      Cur LV                3
      Open LV               3
      Max PV                0
      Cur PV                1
      Act PV                1
      VG Size               19.76 GiB
      PE Size               4.00 MiB
      Total PE              5058
      Alloc PE / Size       5058 / 19.76 GiB
      Free  PE / Size       0 / 0   
      VG UUID               lhePcx-HQYi-26wC-wNoM-pW6e-DMv6-HzUHYf
    Code:
    # ll /dev/mapper/
    total 0
    drwxr-xr-x  2 root root     160 Oct  8 12:31 ./
    drwxr-xr-x 14 root root    4060 Oct  8 22:51 ../
    crw-------  1 root root 10, 236 Oct  8 12:31 control
    lrwxrwxrwx  1 root root       7 Oct  8 12:31 server-root -> ../dm-1
    lrwxrwxrwx  1 root root       7 Oct  8 12:31 server-root-real -> ../dm-0
    lrwxrwxrwx  1 root root       7 Oct  8 12:31 server-snaproot -> ../dm-3
    lrwxrwxrwx  1 root root       7 Oct  8 12:31 server-snaproot-cow -> ../dm-2
    lrwxrwxrwx  1 root root       7 Oct  8 12:31 server-swap -> ../dm-4

    So this behaviour started a few month ago. I can not really tell when it did, since my server is normally up 24/7.

    Another interesting thing. If I run..
    Code:
    # update-grub
    Generating grub.cfg ...
    Found linux image: /boot/vmlinuz-3.2.0-31-generic
    Found initrd image: /boot/initrd.img-3.2.0-31-generic
    Found linux image: /boot/vmlinuz-3.2.0-29-generic
    Found initrd image: /boot/initrd.img-3.2.0-29-generic
    Found linux image: /boot/vmlinuz-3.2.0-27-generic
    Found initrd image: /boot/initrd.img-3.2.0-27-generic
    Found linux image: /boot/vmlinuz-3.2.0-26-generic
    Found initrd image: /boot/initrd.img-3.2.0-26-generic
    Found linux image: /boot/vmlinuz-3.2.0-25-generic
    Found initrd image: /boot/initrd.img-3.2.0-25-generic
    Found linux image: /boot/vmlinuz-3.2.0-24-generic
    Found initrd image: /boot/initrd.img-3.2.0-24-generic
    Found linux image: /boot/vmlinuz-3.2.0-23-generic
    Found initrd image: /boot/initrd.img-3.2.0-23-generic
    Found memtest86+ image: /memtest86+.bin
    rmdir: failed to remove `/var/lib/os-prober/mount': Device or resource busy
    grub-probe: error: unknown filesystem.
    done
    Code:
    # cat /proc/cmdline
    BOOT_IMAGE=/vmlinuz-3.2.0-31-generic root=/dev/mapper/server-root ro
    What is wrong with it? Any hint is very much appreciate!
    Last edited by kodiakz; October 8th, 2012 at 10:03 PM. Reason: More Information

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