HP XP Racks - Manual (Page 24)

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Details about mapping the primary and secondary storage systems to the external system that
contains the in the HP XP P9000 Provisioning for Open Systems User Guide and HP XP P9000
External Storage for Open and Mainframe Systems User Guide.
•
Details about CLPR in the HP XP P9000 Cache Partition User Guide.
•
Details about external path groups in the HP XP P9000 External Storage for Open and
Mainframe Systems User Guide.
Prerequisites
Before you begin, make sure you have:
•
Installed the multipath and system software (see “Installing and configuring software”
(page 22) ).
Workflow
Use the following process to configure the primary and secondary storage systems:
1. Stop Performance Monitor, if it is running, to avoid performance impact on the TCP/IP network.
2. Set the port attributes for ESAM.
3. Configure the primary and secondary storage systems and establish logical paths between
the primary and secondary VSP systems.
Configuring the quorum disks
The quorum disk stores information about the data in the P-VOL and S-VOL. The quorum disk is
used to determine which pair volume has the latest data when a failover is required.
Instructions in this topic describe the following:
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How to configure a quorum disk
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How to configure port parameters for the quorum disk on the primary and secondary systems
Prerequisites
•
The quorum disk must be located in an external storage system that is separate from the primary
and secondary storage systems. For all requirements, see
“Quorum disk requirements ”
(page 14) .
•
If MCU and RCU system configuration has changed, you must reformat the quorum disk volume
in the external storage system.
•
Multipath and system software must be installed. See “Configuring the primary and secondary
storage systems” (page 23) .
Procedure
1. In the external storage system, prepare a volume for use as the quorum disk and specify any
required system options. See
“Quorum disk requirements ” (page 14) .
2. Using the External attribute, configure the ports on the primary and secondary storage systems
that are connected to the disk.
3. Set the paths from the disk to the primary and secondary storage systems to Active.
4. Using RWC’s Ports/Host Groups and External Storages windows, map the primary and
secondary storage systems to the disk by doing the following:
•
Configure at least two cross-system paths between the primary storage system and quorum
disk, and two between the secondary storage system and the quorum disk.
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Specify the these external volume parameters:
- Emulation type: OPEN-V.
24 System configuration