Hitachi TrueCopy for IBM z/OS User and Reference Guide (T5211-96001, June 2007)

Performing TrueCopy for z/OS Pair Operations 6-13
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
Changing Pair Options
The Change Pair Option dialog box (see Figure 6-3) allows you to change the
pair options of existing TrueCopy for z/OS pairs. To open the Change Pair
Option dialog box, click the Pair Operation tab, select a CU grouping or CU
from the tree, select M-VOL from the list, right-click and click Change Pair
Option command.
Figure 6-3 Change Pair Option Dialog Box (Asynchronous)
• Volume: The LDKC number, the CU number, and the device ID.
Note: If "#" is added to the end of the device ID like 00:00:3F#, the LDEV that
the LDEV number indicates is an external volume. For details on an external
volume, please refer to the Universal Volume Manager User's Guide.
• M-VOL Fence Level (Synchronous only): Select the fence level for the new
pair(s). The fence level determines the conditions under which the MCU will
reject write operations to the M-VOL. Never is automatically set for an
asynchronous pair.
• Never: the M-VOL will never be fenced.
– Data: the M-VOL will be fenced when the MCU cannot successfully
execute an update copy operation for any reason.
– Status: the M-VOL will be fenced only if the MCU is not able to change
the R-VOL status to suspended when an update copy operation fails.