
• Fibre Channel disk enclosures—Contains up to 12 disk drives, power supplies, fans, midplane,
and I/O modules.
• Fibre Channel Arbitrated Loop Cables—Provides connectivity to the HSV controllers and the Fibre
Channel disk enclosures.
For information on the EVAs, go to http://www.hp.com/support/manuals. In the Storage section,
click Disk Storage Systems, and in the EVA Disk Arrays section, click HP StorageWorks 6400/8400
Enterprise Virtual Array.
Data Path Modules
One way to think of the pair of DPMs is as being similar to a pair of array controllers, only with eight
host ports and eight back-end ports per controller. The even ports on the DPMs are the SCSI/FCP
targets for all I/O requests initiated by your application servers. The odd ports of the DPMs act as
the SCSI/FCP initiators to the array host port targets. The DPMs are in an active-passive relationship,
meaning that an individual virtual disk is active on one DPM and on standby on the other DPM within
the DPM group. Therefore, it is beneficial to balance the workload of your disks between the DPMs.
VSM server
The VSM server hosts the Virtualization Services Manager (VSM) software and other special
applications. The reason for the custom server configuration is due to other (and less visible) functions
performed by VSM. For more information, see the HP StorageWorks Virtualization Services Manager
v2 Server User Guide. This and other SVSP documentation can be obtained by going to http://
www.hp.com/support/manuals. In the Storage section, click Storage Software, and in the Storage
Virtualization Software section, click HP StorageWorks SAN Virtualization Services Platform.
Management servers
Two management servers are needed with the EVA Cluster. One hosts the HP Command View EVA
management software and the other hosts the HP Command View SVSP management software.
Fibre Channel switches
Two B-series switches are provided to interconnect the EVA Cluster components.
Ethernet switch
One Ethernet switch is required to connect the EVA Cluster components.
Software
This section describes the HP EVA Cluster software and firmware required.
Virtualization Services Manager
The VSM application runs on each VSM server so that both can perform the data replication tasks.
One VSM performs management and configuration tasks and the other VSM acts as a hot standby
for these tasks:
• Data import
Enterprise Virtual Array Cluster Administrator Guide 15
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