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    SubjectRe: data corruption using raid0+lvm2+jfs with 2.6.0-test3
    On Friday August 15, mfedyk@matchmail.com wrote:
    > On Wed, Aug 13, 2003 at 09:05:58AM +1000, Neil Brown wrote:
    > > On Tuesday August 12, akpm@osdl.org wrote:
    > > > Tupshin Harper <tupshin@tupshin.com> wrote:
    > > > >
    > > > > raid0_make_request bug: can't convert block across chunks or bigger than
    > > > > 8k 12436792 8

    > >
    > > Probably the simplest solution to this is to put in calls to
    > > bio_split, which will need to be strengthed to handle multi-page bios.
    > >
    > > The policy would be:
    > > "a client of a block device *should* honour the various bio size
    > > restrictions, and may suffer performance loss if it doesn't;
    > > a block device driver *must* handle any bio it is passed, and may
    > > call bio_split to help out".
    > >
    >
    > Any progress on this?

    No, and I doubt there will be in a big hurry, unless I come up with an
    easy way to make lvm-over-raid0 break instantly instead of eventually.

    I think that for now you should assume tat lvm over raid0 (or raid0
    over lvm) simply isn't supported. As lvm (aka dm) supports striping,
    it shouldn't be needed.

    NeilBrown
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