HP D7171A - NetServer - LPr Introduction Manual page 5

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Functional Diagram of the Direct Connect Cluster
(SPOFless)
Public Network
Cluster
Private
Server Network
#1
FC HBA
Port 1 Port 0 Port 1
External
SCSI #2
Shared
Storage
SCSI #2
Copper Fibre Active
Functional Diagram of the Cluster Using Hubs
(SPOFless)
Public Network
Cluster
Private
Server Network
#1
FC HBA
FC Hub
FC Hub
Port 1 Port 0 Port 1
External
SCSI #2 SCSI #1
Shared
Storage
SCSI #2 SCSI #1
Copper Fibre Active Optical or Copper Fibre
Copper Fibre Passive
SCSI Cable
Documentation
Cluster
Server
#2
FC HBA
Failure
Causes
Port 0
Application
Failover
SCSI #1
SCSI #1
SCSI Cable
Cluster
Server
#2
Failure
Causes
Application
FC HBA
Failover
Port 0
Failure
Causes
Decreased
Performance
Installation and Configuration
Most of the procedure for installing a SPOFless cluster is
identical to the installation of a SPOF cluster solution.
Subsections below only document the differences between
a standard cluster installation and a SPOFless cluster
installation. For more details on how to install and configure
MSCS, take a look at the References section at the end of
this document.
FC Array Assistant Installation
The most important thing to know when installing FC Array
Assistant is to install the SPOFless version, A.00.02-5. The
SPOFless version of FC Array Assistant allows mirroring of
the LUNs, a feature not found in the standard version, but
which is necessary for SPOFless clusters. Additionally it is
important to remember that the server portion and the client
portion of FC Array Assistant must come from the same
installation disk.
Another factor concerning the installation of FC Array
Assistant is the location of the FC array client. In practice, it
is advisable to install a copy of the client on each cluster
node and on the client monitor to ensure it is available
during periods of network instability.
RS/12FC External Shared Storage Configuration
The FC Array Assistant utility is used to configure, manage
and monitor RS/12FC storage. The Manual Configuration
mode is recommended because it provides more control
over the setup of different parameters compared to the
Automatic or Assisted Configuration modes. Manual mode
allows the addition of new RAID sets, addition of logical
drives or editing of the existing configuration.
After FC controllers have been configured they can be
monitored, as can physical devices and logical drives in the
RS/12. Performance monitoring is also implemented in FC
Array Assistant. To learn how to use the FC Array Assistant
tool, refer to the References section at the end of this
document. An example of the Controller Information screen
is shown on page 6.
There are two main issues concerned with the configuration
of the RS/12FC storage subsystem. The first issue has to
do with the consistency of the firmware installation on the
two FC Array controller cards. Before attempting to use
both controllers in the same RS/12FC cabinet it is important
to download the firmware individually to each controller.
This means that the firmware of each controller must be
checked individually in an RS/12 FC cabinet before it can
be used in tandem with another controller.
Also, when flashing the firmware on the controller, the
various configuration parameters on the controller are not
reset. This means that before two controllers are bound
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