HP ProLiant Storage Server User Guide (440584-001, February 2007)

Using Cluster Administrator
Cluster Administrator shows information about the groups and resources on all of your clusters and
specific information about the clusters themselves. A copy of Cluster Administrator is automatically
installed on a cluster node when the Cluster service is installed.
Using Cluster Administrator remotely
For remote a dm inistration, copies of Cluster Administrator can be installed on other co mputers on your
network. TheremoteandlocalcopiesofClusterAdministratorwillbeidentical. Itisalsopossibleto
administer an HP ProLiant Storage Server cluster remotely from a computer running Windows NT 4.0
Service Pack 3 or later, Windows 2000 or Windows 2003 using the Cluster Administrator tool.
The HP Storage Ser ver Management Console
Cluster Administrator is available from the HP Storage Server Management Console under the U tilities
folder. The HP Storage Server Management Console is accessible using Remote Desktop or a web
browser.
Creating a cluster
During the creation of the cluster, Cluster Administrator will analyze and verif y the hardware and software
configuration and identify potential problems. A comp rehensive and easy-to-read report is created, listing
any potential configuration issues before the cluster is created.
Some issues that can occur are:
• No shared disk for the Quorum disk. A shared disk must be created with a NTFS pa r tition at
least 50 MB in size.
• Use of DHCP addresses for network connections. All Network adapters must be c on figured with
static IP addresses in a cluster configuration.
• File Services for Macintosh and Service for NetWare a re not supported in a cluster configuration.
• Dynamic Disks are not supported in a cluster configuration.
• Errors appear on a network adapter that is not configured or does not have an active link. If the
network adapter is not going to be used it should be disabled.
Adding nodes to a cluster
OnlytheQuorumdiskshouldbeaccessiblebythenewnodewhilethenewnodeisnotamemberofthe
cluster. The new node should not have access to the other LUNs in the cluster until after it has joined the
cluster
. After the node has joined the cluster, the LUNs m ay be presented to the new node. Move the
physical disk resources over to the new node to confirm functionality.
CAUTION:
Presenting other LUNs to the non-clustered system could lead to data corruption.
Geographically dispersed clusters
Cluster nodes can be g eographically dispersed to provide an a dditional layer of fault tolerance.
Geographically dispersed clusters are also referred to as stretched clusters.
The following rules must be followed with geographically dispersed clusters:
• A network connection with latency of 500 milliseconds or less ensures that cluster consistency
can be maintained. If the network latency is over 500 milliseconds, the cluster consistency
cannot be easily maintained.
108
Cluster administration