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PERC 3 BIOS Configuration Utility 185
To enable hardware termination, leave the pins open. The default is
hardware termination.
Clustering
NOTE: Clustering is not
supported by PERC 3/QC,
PERC 3/DCL or PERC
3/SC. It is supported by
PERC 3/DC.
Physically, a cluster is a grouping of two independent servers that can access
the same data storage and provide services to a common set of clients. With
current technology, this usually means servers connected to common I/O
buses and a common network for client access.
Logically, a cluster is a single management unit. Any server can provide any
available service to any authorized client. The servers must have access to
the same data and must share a common security model. Again, this
generally means that the servers in a cluster will have the same architecture
and run the same version of the same operating system.
Cluster Mode
You can use the PERC BIOS Configuration Utility to enable or disable
cluster mode. When you enable cluster mode, the system operates in
cluster mode. When you disable cluster mode, the system operates in
standard mode. The following section explains how to do this.
NOTE: You can ignore
this section on enabling
and disabling cluster
mode if you do not use
clustering.
Enabling and Disabling the Cluster Mode
You can enable or disable cluster mode. When you enable cluster mode, the
system automatically disables the BIOS. If any of the controllers are set for
clustering, the following warning appears when you press <Ctrl> <M> to
access the BIOS Configuration Utility:
!!!STOP!!!
This operation may change the configuration of disks and
can cause loss of data! Ensure:
1. Peer server is powered up for its controller NVRAM to be
updated. Otherwise, disk configuration should be read from
disk and saved to the controller’s NVRAM.
2. The second server must not be configuring the disks.
3. There is no I/O activity against shared drives.
4. Press Any Key to Continue.