Installation guide

46 Chapter 2:Hardware Installation and Operating System Configuration
two single-initiator SCSI buses to connect each cluster system to the RAID array is possible. If a log-
ical unit can fail over from one controller to the other, the process must be transparent to the operating
system. Note that some RAID controllers restrict a set of disks to a specific controller or port. In this
case, single-initiator bus setups are not possible.
A single-initiator bus must adhere to the requirements described in Section A.2, SCSI Bus Configu-
ration Requirements. In addition, see Section A.6, Host Bus Adapter Features and Configuration Re-
quirements for detailed information about terminating host bus adapters and configuring a single-ini-
tiator bus.
To set up a single-initiator SCSI bus configuration, the following is required:
• Enable the on-board termination for each host bus adapter.
• Enable the termination for each RAID controller.
• Use the appropriate SCSI cable to connect each host bus adapter to the storage enclosure.
Setting host bus adapter termination is usually done in the adapter BIOS utility during system boot.
To set RAID controller termination, refer to the vendor documentation. shows a configuration that
uses two single-initiator SCSI buses.
Figure 2–5 Single-Initiator SCSI Bus Configuration
Figure 2–6, Single-Controller RAID Array Connected to Single-Initiator SCSI Buses shows the termi-
nation in a single-controller RAID array connected to two single-initiator SCSI buses.