Based on a number of disk platform migrations during which I used IND USER and various products that digest CP Monitor data to track progress, DDR does full track reads when copying from disk to disk. The same is true for disk to tape.

Tom

Schuh, Richard wrote:
When DDR copies one disk to another, a COPY ALL operation, does it do full track reads and writes, copy an entire cylinder in a single I/O, or what?

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