Adaptec 2074700-R User Guide - Page 199
A.1.6, Novell Netware Clustering
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Optional Features A.1.6 Novell Netware Clustering A.1.6.1. Hardware Requirements and Settings Note: Ensure the ICP RAID controllers are equipped with firmware that supports clustering. Refer to the Hardware Guide for firmware versions that support clustering. Observe the points below during hardware setup: • All ICP RAID controllers which control shared Cluster Drives, have to be connected with each other on all IO-channels which host shared drives. Example 1: Two ICP RAID controllers control a shared RAID 5 Array which consists of three hard disk drives. These three drives are on the same IO-channel. In this example both ICP RAID controllers have to be connected with this IO-channel. Example 2: Two ICP RAID controllers control a shared RAID 5 Array which consists of four hard disk drives, where two drives are connected with IO-channel A and the other two with IO-channel B. In this example both ICP RAID controllers have to be connected with both IO-channels. • It is highly recommend that you use external high quality hot pluggable disk enclosures. These units should support SAF-TE. The boot system and operating system should be isolated from the shared storage. You could think of a separate RAID 1 protected array drive. Note: It is highly recommended that you install cluster array drives. To setup a cluster array drive which will contain NCS Cluster volumes, follow these rules: • With the exception of one server unit, all other server units of the Cluster should be switched off. On this server unit the Cluster array drive receives its initial setup. • At system boot level of this one server unit press + to enter the ROM- resident ICPCON program. • Choose the "Configure Host Drive" menu. At a certain point of the setup procedure ICPCON will ask you if the newly created host drive should have the type "Cluster". Confirm with "y" for yes. • If you are not sure if the hard disk drives you use will protect their cache from data loss in case of a Bus reset, switch off the writes caches of these drives. Use the "Configure Physical Devices" menu within ICPCON. • Cluster array drives of ICP RAID controller's are protected against any kind Controller failure with a "Transaction Tracking" system. This system is activated by default. If this feature is not desired (for example, because of performance reasons), it can be switched off. To accomplish this, all server units of the cluster except one have to be switched off. A.1.6.2. Installation of Netware OS and Cluster Services Please make sure that you install the latest versions of Netware, the corresponding Service Packs and the Netware Cluster Services. If you are not sure which versions you have and whether they are up-to-date or not, please contact your local Novell distributor or visit Novell's web site (www.novell.com). Software Installation and User's Guide 199