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    SubjectRe: Linux mdadm superblock question.
    On Thu, Feb 11, 2010 at 05:52:41PM -0800, Michael Evans wrote:
    > You need the superblock at the end of the partition: If you read the
    > manual that is clearly either version 0.90 OR 1.0 (NOT 1.1 and also

    For lilo, at least, this is not so:

    http://www.sfr-fresh.com/linux/misc/lilo-22.8.src.tar.gz:a/lilo-22.8/raid.c

    Line 145:

    if (ioctl(md_fd,RAID_VERSION,&md_version_info) < 0)

    Line 155:

    if (ioctl(md_fd,GET_ARRAY_INFO,&md_array_info) < 0)

    Lines 160-168:

    if ((md_array_info.major_version != md_version_info.major) &&
    (md_array_info.minor_version != md_version_info.minor)) {
    die("Inconsistent Raid version information on %s (RV=%d.%d GAI=%d.%d)",
    boot,
    (int)md_version_info.major,
    (int)md_version_info.minor,
    (int)md_array_info.major_version,
    (int)md_array_info.minor_version);
    }

    It's 0.90 or nothing as md_version_info gives 0.90 due to:

    /linux/drivers/md/md.c:
    Line 4599:

    ver.major = MD_MAJOR_VERSION;
    ver.minor = MD_MINOR_VERSION;

    linux/include/linux/raid/md_u.h:
    Line 23:

    #define MD_MAJOR_VERSION 0
    #define MD_MINOR_VERSION 90

    I got bitten by this as I was testing different raid superblocks on a new
    setup. Wound up hand-making my own initramfs, which was a pain (right pain
    to debug). Would prefer not to have one tbh.

    --
    "A search of his car uncovered pornography, a homemade sex aid, women's
    stockings and a Jack Russell terrier."
    - http://www.news.com.au/story/0%2C27574%2C24675808-421%2C00.html


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