Hitachi TrueCopy for z/OS User Guide (T1711-96024, November 2011)

114 Hitachi TrueCopy z/OS for HP XP12000/XP10000 and SVS 200 storage systems
Changing the subsystem option settings
The subsystem’s option settings are displayed by selecting Subsystem from the tree on the Other
Operations panel (Figure 60).
Figure 60 Subsystem Option Settings List and Pop-up Menu
• Activity: Number of volumes in concurrent initial copy operations (1 to 128)
• Path Watch: Time for monitoring blockade in the paths (0 to 45 seconds)
• Path SIM Watch: Time for monitoring SIMs that are reported when paths are blocked (1 to 100
seconds)
To change the subsystem option settings:
1. Click the Other Operations tab, and then select Subsystem in the tree.
2. Right-click the list to display the pop-up menu, and select System Option to open the System Option
panel.
Figure 61 System Option panel
The current system option settings are displayed:
• Maximum Initial Copy Activities specifies the number of concurrent initial copy and resync
operations: 1 volume to 128 volumes. The defaults setting is 64 volumes. TrueCopy for z/OS initial
copy activities can impact the performance of the main subsystem, depending on the amount of I/O
activity and the number of pairs being registered at the same time. The maximum initial copy