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    SubjectNFS corruption (duplicated data)
    I really don't understand what could be causing this, but it happens on
    several machine and at least on kernels 2.4.22, 2.4.25, 2.4.26.
    NFS v3 : hard, udp, rsize=8192,wsize=8192
    local filesystems are XFS

    Trond, this is data corruption not dropped packets so the protocol
    being UDP is not the problem.

    Here is what is happening :

    Copying a file of offsets from machine A to machine B over NFS and then
    comparing the file on B with the file on A over NFS, the file on machine B
    is corrupted in the following ways.

    Usually, data earlier in the file will show up again later.
    For example :

    57344 bytes of data from 672190464-672247807 is also in positions
    1449664512-1449721855

    sometimes, data later in the file is dupped to a position before it
    should be

    53248 bytes of data from 1197158400-1197211647 is also in positions
    1036660736-1036713983

    Any ideas

    Andy
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