
592 DS8800 Performance Monitoring and Tuning
We described the suggested placement of the FlashCopy source and target volumes in the
previous section. See Table 18-3 on page 590 for a summary of the conclusions. For the best
background copy performance, always place the source and target volumes in different ranks.
There are additional criteria to consider if the FlashCopy is a
full box copy that involves all
ranks.
For full box copies, still place the source and target volumes in different ranks. When all ranks
are participating in the FlashCopy, you can still place the source and target volumes in
different ranks by performing a FlashCopy of ...