Hitachi ShadowImage for z/OS user guide (HIT9503-96004, June 2006)

ShadowImage for z/OS user guide 51
• Total differential tables: The total number of differential tables that can be used for FlashCopy Mirror
Version 2 operation.
• Remaining differential pair table(s): The remaining number of differential tables that can be used for
FlashCopy Mirror Version 2 operation.
NOTE: In addition to FlashCopy Mirror Version 2, ShadowImage, ShadowImage for z/OS, Flex
Copy XP, Snapshot XP, and Auto LUN XP, use differential tables. Therefore, if ShadowImage,
ShadowImage for z/OS, Flex Copy XP, or Snapshot XP, pairs exist, or migration plans are being
executed by Auto LUN XP, you might be able to establish fewer numbers of relationships than the
total number.
• Relationship Expansion: displays the status of the relationship expansion function which has been set
by FlashCopy Mirror Version 2 : Enable or Disable.
NOTE: The relationship expansion function enables you to increase the maximum number of relationships
that can be created by using FlashCopy Mirror Version 2 .
• FlashCopy V2 Relationships: Information about FlashCopy Mirror Version 2 relationships in the volume
list. You can select information displayed in this volume list using the CU list and check boxes below.
• CU list: Select the CU containing volumes you want to display in the volume list.
• Check boxes: Select the type and status of volumes you want to display in the volume list. Table 16
shows the features of each check box.
• Volume list: Displays information about volumes that form FlashCopy Mirror Version 2
relationships.
You can select volumes displayed in this volume list using the CU list and check boxes.
• OK: Closes the FlashCopy Information pane.
Performing ShadowImage Operations
This section describes SI390 windows and operations.
NOTE: Before performing SI390 operations, check that one or more normally functioning microprocessors
for the CU group 0 exist, otherwise all the commands that change the pair status (e.g. commands that
create or delete a pair) will be rejected and you can only display the windows and reference the pair
status. For information about how to check the status of the microprocessors, please call the Support
Center.
Setting the Reserve Attribute
Use the Set Reserve Attribute window to set the reserve attribute for the volume(s) selected on the
ShadowImage main window. To open the Set Reserve Attribute window, select one or more unreserved
simplex volumes in the Volume List box on the ShadowImage main window, right-click to display the
pop-up menu, and then click Change Reserve.
Table 16 Check Boxes in FlashCopy V2 Relations
Check Box Displayed Information
Source S-VOLs of the FlashCopy Mirror Version 2 relationships
Target T-VOLs of the FlashCopy Mirror Version 2 relationships
Normal Volumes of the FlashCopy Mirror Version 2 relationships in normal status
Failed Volumes of the FlashCopy Mirror Version 2 relationships in abnormal status