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Chapter 5 Configuring Storage Systems and Logical Paths 5-9
Hitachi Universal Replicator for IBM /OS User’s Guide
• Activities: The number of volumes that can be copied concurrently during
an initial copy operation.
Figure 5-2 System Option Window
• Maximum Initial Copy Activities: Specifies the number volumes that
can be copied concurrently during an initial copy operation. A value within
the range of 1 to 128 can be specified. The default setting is 64 volumes.
Maximum Initial Copy Activities can impact the performance of the
primary storage system, depending on the amount of I/O activity and the
number of pairs being registered at the same time. If Maximum Initial
Copy Activities is 64 volumes, it allows you to limit the impact of initial
copy activities on storage system performance. For example, if you set the
maximum initial copy activities to 64 volumes and then add 65 pairs at the
same time, the primary storage system starts the first 64 pairs and will not
start the 65th pair until one of the pairs is synchronized. When you change
the maximum initial copy activities setting, the new setting applies to pairs
created after the setting was changed, not to existing pairs.
• Set: Closes the System Option window and then adds the settings to the
Preview list.
• Cancel: Cancels the settings.