D
Dapeng Wu
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Another thing you can try is to rerun the backup with "-verbose" but without "-com". If it fails again, check the block number and the actual file size; and compare them with the results with "-com". If the whole db is backed up successfully, the one without "-com" should produce a much large file size. This also means something wrong with the compression in this case. If it fails at a point where block number is smaller but file sizes are similar, then it's probably an issue with writes to the backup file. If it fails at a point where block numbers are similar (should also have larger file size), then it's probably an issue with certain blocks after that block number. Dapeng
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