> bs=102400 or bs=128k will dd faster though.... you can play with that.

That's not my experience.  8k dd runs at disk speed (30-40 MB/s) on
all the machines I've used recently when copying between different
disks on different ATA controllers.  Between disks on the same
controller I only get about 13MB/s (why?) but there's no difference
between 8k and 128k dd.

-- Richard


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