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jsnadml,
Welcome to Juxtlinux.
I believe dd does not distinguish empty space from files because everything are bits of "1" and "0".
The number of records times the block size should equal exactly the disk size in a successful pass. In your case it looks the disk has some kind of corruption or enough of bad sectors serious enough to prevent the disk from being read continuously.
I do not have a solution for it. You may need to slow down the read access by changing the DMA mode or use a different version of dd like dd_rescue. I haven't had a need to go into such a bad disk myself. There have been a few posts here saying a dead disk could be brough back from life with various tricks.
Last edited by saikee; 10-16-2007 at 04:47 PM.
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