Bugzilla Bug 190858

mdadm-2.6.3 was released 20th August 2007. Quote from its ChangeLog:

Changes Prior to 2.6.3 release
    -   allow --write-behind to be set for --grow.
    -   When adding new disk to an array, don't reserve so much bitmap
        space that the disk cannot store the required data. (Needed when
        1.x array was created with older mdadm).
    -   When adding a drive that was a little too small, we did not get
        the correct error message.
    -   Make sure that if --assemble find an array in the critical region
        of a reshape, and cannot find the critical data to restart the
        reshape, it gives an error message.
    -   Fix segfault with '--detail --export' and non-persistent
        superblocks.
    -   Various manpage updates.
    -   Improved 'raid4' support (--assemble, --monitor)
    -   Option parsing fixes w.r.t -a
    -   Interpret "--assemble --metadata=1" to allow any version 1.x
        metadata, and be more specific in the "metadata=" message printed
        with --examine --brief
    -   Fix spare migration in --monitor.

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