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    SubjectRe: [RFCI] How best to partition MD/raid devices in 2.6
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    On Fri, 14 Nov 2003, Neil Brown wrote:

    [...]

    > 3/ define minor numbers of block-major-9 that are larger than 255 to
    > have 6 bits of partitioning information. i.e.
    > 9,0 -> md0
    > 9,1 -> md1
    > ...
    > 9,255 -> md255
    > 9,256 -> md256
    > 9,257 -> md256p1
    > 9,257 -> md256p2
    > ...
    > 9,320 -> md257
    > 9,321 -> md257p1
    > ...
    > This has least impact on other system and is in some ways simplest,
    > but it has the problem of lack of uniformity. You wouldn't be able
    > to partition md0, but that isn't a big problem as long as you can
    > partition some md arrays.

    How about assigning the partition space above

    9,0 => md0
    9,1 => md1
    ...
    9,257 => md0p1
    9,258 => md0p2
    ...
    9,320 => md1p1

    That should be sensibly backward compatible, I think, and still allow
    all the MD devices to be partitioned.

    Daniel

    --
    No, no, you're not thinking, you're just being logical.
    -- Niels Bohr
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