HP ProLiant Storage Server User Guide (440584-003, September 2007)

NOTE:
The LUN underlying the basic disk should be presented to only one node of the cluster using selective
storage presentation or SAN zoning, or having only one node online at all times until the physical
resource for the basic disk is established.
In preparing for the cluster installation:
• All software components listed in the HP ProLiant Storage Server SAN Connection and
Management white paper (located on the HP web site at h
ttp://h20000.www2.hp.com/bc/
docs/su pport/SupportManual/c00663737/c00663737.pdf)mustbeinstalledandthefiber
cables attached to the HBAs before the cluster installation is started.
• All shared disks, including the Quorum disk, must be accessible from all nodes. When testing
connectivity b etween the nodes and the LUN, only one node should be given access to the
LUN at a time.
• All shared disks must be configured as basic (not dynamic).
• All partitions on the disks must be formatted as NTFS.
Network planning
Clusters require more sophisticated networking arrangements than a stand alone storage server. A
Windows NT domain or Active Directory domain must be in place to contain the cluster names, virtual
server names, and user and group information. A cluster cannot be deployed into a non domain
enviro nm ent.
All cluster deployments have at least six network addresses and four network names:
• The cluster name (Unique N ETBIOS Name) and IP address
• Node A's name and IP address
• Node B's name and IP address
• At least one virtual server name and IP address for virtual server A
• Cluster Interconnect static IP ad dresses for Node A and Node B
In multi-node deployments, additional network addresses are required. For each additional node, three
static IP ad dresses are required.
Virtual names and addresses a re the only identification used by clients on the network. Because the
names and addresses are virtual, their ownership can transition from one node to the other during a
failover, preserving access to the resources in the cluster group.
A cluster uses at least two network connections on each node:
• The private cluster interconnect or “heartbeat” crossover cable connects to one of the n etwork
portsoneachclusternode.Inmorethantwonodedeployments,aprivateVLANonaswitchor
hub is required for the cluster interconnect.
• The public client network subnet connects to the remaining network ports on each cluster node.
The cluster node names and virtual server names have IP addresses residing on these subnets.
NOTE:
If the share is to remain available during a failover, each cluster node must be connected to the same
network subnet. It is impossible for a cluster node to serve the data to a network to which it is not
connected.
Protocol planning
Not all file sharing protocols can take a dvantage of clustering. If a protocol does not support clustering, it
will not have a cluster resource and will not failover with any cluster group. In the case of a failover,
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Cluster administration