HP XP Racks - Manual (Page 40)

Requirements
Make sure that the following requirements are met to ensure the pair can be changed correctly
without errors or failures:
•
ESAM system requirements must be met.
•
The microcode version of the primary and secondary storage systems must be DKCMAIN
70-01-62-XX/XX or later.
•
A quorum disk ID must be registered.
•
The Continuous Access Synchronous pair must not be registered to a consistency group.
•
CU Free are specified on the primary and secondary storage systems when the Continuous
Access Synchronous pair was created.
•
The P-VOL is in the primary storage system. If the S-VOL is in the primary storage system, run
the horctakeover command on the S-VOL to reverse the P-VOL and the S-VOL of the pair.
CAUTION: If this operation fails, check Continuous Access Synchronous pair options to make
sure that they have not changed. A failure can cause unexpected changes, for example, the P-VOL
fence level could change from Data to Never.
Procedure
1. Access the MCU in RWC, then click Actions > Remote Copy > Continuous Access Synchronous
> Pair Operation.
2. Make sure that you are in the modify mode.
3. In the Pair Operation window tree, select a CU group, CU, port, or host group where the
Continuous Access Synchronous P-VOL belongs.
4. Split the Continuous Access Synchronous pairs that you want to convert to ESAM pairs.
5. On the Pairsplit -r dialog box, specify parameters you want and then click Set.
6. On the Pair Operation window, verify the setting for Preview and click Apply.
7. Verify that the pair status is PSUS.
8. In the list, select and right-click the Continuous Access Synchronous P-VOL, and then click
Pairresync.
9. In the Pairresync dialog box, use the following settings:
•
For P-VOL Fence Level, specify Never.
•
In Change attribute to ESAM, specify Yes.
•
In Quorum Disk ID, specify a quorum disk ID for the ESAM pair.
10. Click Set.
11. Verify settings in Preview pane, then click Apply.
12. Verify that the Status column shows COPY for the pair that you converted, and that the Type
column shows ESAM.
To update the information in the window, click File > Refresh.
13. Access the secondary storage system, open the Pair Operation window, and verify that the
Type column for the S-VOL is ESAM.
CAUTION: Application I/Os cannot be taken over in case of a failover until the window
shows ESAM for the S-VOL. Before moving onto the next step, wait for a while and refresh the
window to make sure ESAM appears.
14. Make sure that the host recognizes the ESAM pair.
40 Working with volume pairs