PERC 3 BI OS Confi gurat ion Uti lit y 185To enable hardware termination, leave the pins open. The default ishardware termination.Clustering NOTE: Clustering is notsupported by PERC 3/QC,PERC 3/DCL or PERC3/SC. It is supported byPERC 3/DC.Physically, a cluster is a grouping of two independent servers that can accessthe same data storage and provide services to a common set of clients. Withcurrent technology, this usually means servers connected to common I/Obuses and a common network for client access.Logically, a cluster is a single management unit. Any server can provide anyavailable service to any authorized client. The servers must have access tothe same data and must share a common security model. Again, thisgenerally means that the servers in a cluster will have the same architectureand run the same version of the same operating system.Cluster ModeYou can use the PERC BIOS Configuration Utility to enable or disablecluster mode. When you enable cluster mode, the system operates incluster mode. When you disable cluster mode, the system operates instandard mode. The following section explains how to do this.NOTE: You can ignorethis section on enablingand disabling clustermode if you do not useclustering.Enabling and Disabling the Cluster ModeYou can enable or disable cluster mode. When you enable cluster mode, thesystem automatically disables the BIOS. If any of the controllers are set forclustering, the following warning appears when you press toaccess the BIOS Configuration Utility:!!!STOP!!!This operation may change the configuration of disks andcan cause loss of data! Ensure:1. Peer server is powered up for its controller NVRAM to beupdated. Otherwise, disk configuration should be read fromdisk 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.
