HP XP Racks - Manual (Page 69)

Configuration requirements
To ensure that ESAM functions properly, make sure that:
•
Both the MCU and RCU are be P9500s.
•
The same version of Hitachi Dynamic Link Manager are used in the MCU and RCU.
•
If using MSFC, specify Node and File Share Majority in Quorum Mode.
•
If using MSFC, use only basic disks.
•
If using PowerHA (HACMP), use enhanced concurrent volume groups.
Configuring the system
Use the following workflow for setting up and creating an ESAM pair. Some steps vary, depending
on whether you use cluster software or software with SCSI-2 Reservation. This noted is noted in
the step.
1.
Install and connect the hardware.
2. Set up a heartbeat network between an executing node and a standby node.
3. Install software.
4. Configure MCU and RCU.
5. Configure a quorum disk.
6. Configure host mode options. Host mode option 52 is required for host groups when using
cluster software with SCSI-2 Reservation where an executing node and a standby node reside.
Also, when using software with SCSI-2 Reservation, if host mode option 52 is enabled, confirm
that the volume to be used as the S-VOL does not have SCSI-2 Reservation and SCSI-3 Persistent
Reservation. To check, see the section on host-reserved LUN windows in the HP XP P9000
Provisioning for Open Systems User Guide.
7. Create the ESAM pairs.
NOTE: If using software with SCSI-2 Reservation, create the ESAM pairs specifying Entire
Volume for Initial Copy in the Paircreate(ESAM) dialog box. This setting results in a full initial
copy; all of the P-VOL data is copied to the S-VOL.
However, if you need to create the pair without copying P-VOL data to the S-VOL, then create
a Continuous Access Synchronous pair and specify None for Initial Copy. When the pair is
created, split it, then change to an ESAM pair.
8. Configure a cluster.
Fore more information, see the documentation for your software. If necessary, contact the HP
Technical Support.
Disaster recovery in a cluster system
Use the following workflow to recover from failure.
1.
Confirm that the primary and secondary storage systems are operating normally.
If a failure has occurred in one of the systems, use the appropriate disaster recovery procedure.
2. Confirm that the software is operating normally.
If a failure has occurred in the software, see the software’s documentation for recovery
instructions.
3. Use the software to fail back from a standby node to an executing node.
Configuration requirements 69