HP XP P9500 Storage - Manual (Page 73)

Procedure 23 To delete the Continuous Access Synchronous relationship
1. In Remote Web Console, click Actions > Remote Copy > Continuous Access Synchronous >
RCU Operation.
2. Change to Modify mode by clicking the icon.
3. Make sure MCU&RCU is selected in the Display box.
4. Click the primary system CU, then select the RCUs that you want to delete from the RCU list.
Right-click and click RCU Operation/ Delete RCU.
5. When the confirmation message appears, click OK.
6. Verify the requested operations in the Preview list.
To remove one or more operations, select the operations from the preview list, right-click, and
click Delete.
7. When ready, click Apply.
Managing power-off for systems and network devices
Though you are responsible for controlling power-off activities, it is advisable to check with your
HP representative for assistance.
The following topics provide information for planned outages when Continuous Access Synchronous
is present.
General information
Please review the following system behaviors regarding powering off:
•
Continuous Access Synchronous pairs are not affected when power is removed from a primary
system while operations are in progress.
•
When power is restored on the primary system, the system communicates with the remote
systems to confirm S-VOL pair status(es). Make sure that Continuous Access Synchronous
communications are fully restored (all paths have normal status) before beginning I/O
operations to the P-VOL.
If the primary system accepts an I/O for a P-VOL before this, all communications are restored,
and the primary system will suspend the pair and change P-VOL status to PSUE-by RCU. The
primary system cannot change the pair status of the S-VOL.
•
If power is removed from a secondary system or from a data path component while Continuous
Access Synchronous operations are in progress, the primary system detects the communication
failure, suspends all affected pairs, and generates SIMs reporting the failures. The primary
system changes the P-VOL status to PSUE-by RCU but cannot change the status of the S-VOLs.
•
If a primary or secondary system is powered off and the backup batteries are fully discharged
while pairs are suspended, differential data is retained to SSD. In this unlikely case, MCU
copies differential data to RCU when the pairs are resynchronized.
Planned outage of the primary system
A planned outage of the primary system does not affect Continuous Access Synchronous.
Planned outage of the secondary system or data path
You must split the pairs in a secondary system prior to a planned outage of the system or to a data
path component (for example, switch, channel extender).
Managing power-off for systems and network devices 73