dd / netcat / md5sums: hashes do not match

From: solana (solana_nexus_at_hotmail.com)
Date: 09/17/03

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    Date: 17 Sep 2003 10:31:36 -0700

    Hey..

    situation:

    got a partition /dev/hda1 I would like to create a true binary copy
    of, across the network, creating a file on the other side I can later
    on mount as a loop device.

    A is the machine with the partition I would like to copy, a
    vmware-linux guest system (vmware 4.0.2)

    B is the machine I would like to end up with the file that contains
    the part of A, the linux host system B is running as guest in.

    both machines have standard ext2 filesystems.

    transfer across network w/ netcat.

    B# nc -l -p 6789 | dd of=./hda1.img bs=512 conv=noerror
    A# dd if=/dev/hda1 bs=512 conv=noerror | nc <B's IP> 6789

    getting something like this:
    A: (source)
    3084416+0 records in
    3084416+0 records out

    B: (dest)
    1464124+184839 records in
    1464124+184839 records out

    network connection is 100MBit/sec FE.

    the image hda1.img on B gets created fine. I can even mount it with
    B# mount -ro,loop,noatime ./hda1.img /mnt/hdacopy

    however, the md5 hashes dont check out / do not match up.

    Any idea what I am doing wrong?

    thanks!!!

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