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    Subjectkernel Unaligned AIO/DIO on inode EXT4-fs Unaligned AIO/DIO on inode by VirtualBox; performance will be poor.
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    Hi all,
    Sorry for the Newb question but I can't find much clarification of
    what this means via google search. Having seen that it's a generic
    kernel error message which just happens to be caused by Virtualbox, I
    do not think that Virtualbox is the culprit ?

    Dec 20 09:27:24 simon-Vostro1510 kernel: [ 345.592265] EXT4-fs
    (sda5): Unaligned AIO/DIO on inode 3408273 by VirtualBox; performance
    will be poor.
    Dec 20 15:27:24 simon-Vostro1510 kernel: [21945.601069] EXT4-fs
    (sda5): Unaligned AIO/DIO on inode 3408273 by VirtualBox; performance
    will be poor.
    Dec 21 07:58:48 simon-Vostro1510 kernel: [75161.962664] EXT4-fs
    (sda5): Unaligned AIO/DIO on inode 3408273 by VirtualBox; performance
    will be poor.
    Dec 21 13:58:48 simon-Vostro1510 kernel: [96762.223676] EXT4-fs
    (sda5): Unaligned AIO/DIO on inode 3408273 by VirtualBox; performance
    will be poor.
    Dec 22 11:25:52 simon-Vostro1510 kernel: [173988.954615] EXT4-fs
    (sda5): Unaligned AIO/DIO on inode 3408273 by VirtualBox; performance
    will be poor.
    Dec 22 11:25:52 simon-Vostro1510 kernel: [173988.954615] EXT4-fs
    (sda5): Unaligned AIO/DIO on inode 3408273 by VirtualBox; performance
    will be poor.
    Dec 21 13:58:48 simon-Vostro1510 kernel: [96762.223676] EXT4-fs
    (sda5): Unaligned AIO/DIO on inode 3408273 by VirtualBox; performance
    will be poor.

    root@simon-Vostro1510:/var/log# parted /dev/sda align-check opt 5
    5 aligned

    Linux simon-Vostro1510 3.0.0-14-generic #23-Ubuntu SMP Mon Nov 21
    20:28:43 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

    root@simon-Vostro1510:/home/simon/VirtualBox VMs/Win7 64bit# ls -lah
    -rw------- 1 simon simon 116G 2011-12-22 20:12 Win7.vmdk

    Anything I can do to stop this message ?, a change in virtual disk
    file from vmdk to VDI or ...something ?

    regards
    Simon McNair


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